Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34b457d240ea0b3…

MALICIOUS

PDF

103.9 KB Created: 2021-06-07 06:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2af09f96fd35f3e4922f6b1db18a8a35 SHA-1: 15ff91709b82cced0256f4fbdc80b2f00f7bffdc SHA-256: f34b457d240ea0b369b1903251f4c2b893ddd9bc47608a1cf84e64be0695e10e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9775

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://inwebjor.ru/pbw?utm_term=paginas+para+descargar+peliculas+en+ingles+por+utorrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410216/normal_6030e0fd35c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_605f9cb3de314.pdfIn PDF document text
    • https://fifukujujaki.weebly.com/uploads/1/3/2/6/132680890/1637070.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/xegujusigozimeniv.pdfIn PDF document text
    • https://dopizuledukure.weebly.com/uploads/1/3/2/3/132302960/vimalekinaderok_mevop.pdfIn PDF document text
    • https://tulelamesesixe.weebly.com/uploads/1/3/5/3/135321102/91838e.pdfIn PDF document text
    • https://xulobefopit.weebly.com/uploads/1/3/4/3/134349373/29de4457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_5fda77c4270d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_603f01bd7f42b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_6009553264c49.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/2261308.pdfIn PDF document text
    • https://dugaxopi.weebly.com/uploads/1/3/5/3/135305828/pijawebuninufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5fdb35653ccdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_601e1f9fa0474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_605f682222f9b.pdfIn PDF document text
    • https://bopifodefow.weebly.com/uploads/1/3/4/3/134383970/488ff68cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_60078a63da5e7.pdfIn PDF document text
    • https://zoziwaxixu.weebly.com/uploads/1/3/5/3/135316133/pevuverig_mifor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_60439632bbb68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08e02b0-5377-4e73-8e69-28f40d27db25/romeo_and_juliet_film_classification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef452c5-a207-4a2a-9f21-edb745994e7a/how_to_cook_frozen_ribs_in_a_pressure_cooker.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144483732/23947232177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e96469-b248-4d3a-ac38-5c128cff9553/verizon_fios_quantum_gateway_model_g1100_red_light.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144688023/37439166367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a98b0a5-c585-4057-9c21-05264edc9c62/the_hobbit_the_battle_of_the_five_armies_full_movie_download_in_tamilrockers_tamil.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144415707/73904403338.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/tutuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae438522-ae84-4e9b-a80d-a1e24d57dbd9/48868353967.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 6588 bytes
SHA-256: c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285
font_01_sfnt_off00011665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11665 5244 bytes
SHA-256: b2707da102403c25eed84d28b6dacdc5ee61fb73786a7e781fe6f4db8ba4c9de
font_02_sfnt_off00012808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12808 6340 bytes
SHA-256: 7928f6bfcacf4b8c2218b012f30d6a688f7d600c2bceec2598b03ee34226b8f3
font_03_sfnt_off00013794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13794 6344 bytes
SHA-256: 05345252609a6129d0952cd1c033237749cc7f4c4d53b0509abe555febe8d862
font_04_sfnt_off00014e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8D 11872 bytes
SHA-256: 1a3e9e1c5c969cd814069e4e606089d9f62f55d7e76f340a96d37d8c8a35ab8c
font_05_sfnt_off0001757b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1757B 16904 bytes
SHA-256: d1750e62cdbc6792864316b612e5587afd73bce43d688c53ac84ba8c2754d291

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