Malicious PDF — malware analysis report

Static analysis result for SHA-256 11105c5b66963376…

MALICIOUS

PDF

85.8 KB Created: 2021-03-20 04:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5f34feb559e7ee4e7fd00fd2e67fd6c1 SHA-1: 2705c558d6f59d643d16330fb45e46eac1f2777a SHA-256: 11105c5b66963376eab737b3cfc0322a7e28b8a1287d73addfc72e4aa9127d54
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic pointing to a tactic of generating numerous links for SEO manipulation or to host malicious content. The embedded URLs likely lead to further malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=air+india+chicago+to+delhi+business+class PDF link annotation
    • https://wusuritod.weebly.com/uploads/1/3/0/7/130739885/6178409.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/14.3_water_pollution_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454545/normal_5fc6b0135db8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428062/normal_5fc73cf557fe6.pdfIn PDF document text
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/28497574a26c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_604e4cf5d2b85.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/little_do_you_know_guitar_chords.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5ff41afa4cf94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitubak.atwebpages.com/8024688460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5b0e3f-e111-478a-a7a2-fdad878ede47/can_i_make_bacon_on_a_george_foreman_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b90fb7e-b40e-44a1-ae7f-4347231bc4c7/94714000621.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_af14fad8aac54f2b8c40452da8aaa20b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f292ca6f-c9ea-48a4-965c-90cab0786534/zuriwij.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_fb9e40d5bb0240f0acc1163baae35d2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c160290-9832-4bb1-81bc-48276d4cdca7/tabela_fipe_de_carros_usados_volkswagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0880dd2f-f59d-4a80-80bb-2157ad751735/79366800016.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_5cf34f155bb547bfa5c64752a649be41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/821bbae0-0f84-4ff5-ab7c-309c89f2b533/chamberlain_clicker_universal_keyless_entry_klik2u-p2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b96dd57-b1dd-42e2-be1e-e026212dfaf3/74591210653.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_e52093df7596425d83eece03ef8bc393.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b963e1-3e38-4cb0-b1d9-a363c8cf234a/jiriwezulitaxoravorawevuw.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 5328 bytes
SHA-256: 1a44078428ca185fb46b7e0054f37fc3e76f78fbbfa4c068417c72e1a9959c8f
font_01_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 10596 bytes
SHA-256: 0dcc6b812dd83f5776ecf735cdd4dc020f3828d8d5232bd64519877cecf77336
font_02_sfnt_off00013343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13343 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1

Open this report in the interactive analyzer, or submit your own file for analysis.