Malicious PDF — malware analysis report

Static analysis result for SHA-256 03af0632bbc65c6d…

MALICIOUS

PDF

92.6 KB Created: 2021-04-05 13:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 467208567e1e50aa99c0cef5f30bb895 SHA-1: d9d4ddbde9bcc56bb13e6409e0cf0f6404276a78 SHA-256: 03af0632bbc65c6d1c52d58a6302d97b78e0916de64817dcc5b71819c5321385
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm designed to distribute traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://bologen.ru/wix?keyword=ap+psychology+biological+bases+of+behavior+study+guide PDF link annotation
    • https://kanolapegagidil.weebly.com/uploads/1/3/4/3/134339460/4174093.pdfIn PDF document text
    • http://gufutaca3.xyz/whens_the_best_time_to_go_squid_fishingyfar1.pdfIn PDF document text
    • http://quickstore.pro/como_transformar_3_arrobas_a_kilogramosy74z4.pdfIn PDF document text
    • https://dewokipapofoz.weebly.com/uploads/1/3/2/7/132741709/revalumizo.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/dijuxaf.pdfIn PDF document text
    • http://idealslim-ordina.site/jivelemilawedu8bfxf.pdfIn PDF document text
    • http://avto-document.site/47843368426afoxj.pdfIn PDF document text
    • http://medicinfo.online/vk_publications_accountancy_class_12_solutionsby18s.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/b8Tl0ih/fivagibak.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/iiaHXCu/hey_clay_dinos_stegosaurus.pdfIn PDF document text
    • https://zakulupibuwuvos.weebly.com/uploads/1/3/4/6/134686441/jafudav.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/what_is_oobelib.log1e8ni.pdfIn PDF document text
    • http://zhigina.ru/78966911575l72ig.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/vnH0kih/extreme_landings_game_download.pdfIn PDF document text
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/5329133.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/586cdb0e-e279-4c27-b2e2-7b93ae7b6568/redib.pdfIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_b78ec1d287ac4031987c38bfb77657d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce56fc25-6f7b-4783-b78a-8bb400ff1c12/electric_motors_and_control_systems_2nd_edition.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_edb7a3d5fb2d4d7b913be723e6f33500.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e057a884-9058-4e59-a3e2-7e08139ff42a/mr_grinch_song_lyrics_pentatonix.pdfIn PDF document text
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_798f0fa9ed7a4d4b95bf1aebb8779ee3.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_87c8283d431f4652b90ea4590a718b55.pdf?index=trueIn PDF document text
    • https://37dcb74a-b492-4e6c-94d7-6984b04a3d7f.filesusr.com/ugd/01eaca_91c89d6c933f42fdad115fde17a5926e.pdf?index=trueIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 5708 bytes
SHA-256: 9b1aac64e51131318efbdcdf070222920caecdabe4c80cc3f4845cb5545c2b0c
font_01_sfnt_off0001063c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 6728 bytes
SHA-256: c8eef9da4ed04994f8edf18a1e57ea42e278534d60cfe16855754066ca11c741
font_02_sfnt_off00011d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D59 11424 bytes
SHA-256: deab2952b80bbfb9161b88ad67a0a2fbe20a7c38d6f93746d01a9fa09348bdd2
font_03_sfnt_off00014442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14442 16340 bytes
SHA-256: 4e16a01ba01ffeace7124abaf54e21934a1d52f554f4e2c2e4bf5a120db54e96
font_04_sfnt_off000159f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F4 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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