Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e479ed6bd7208b…

MALICIOUS

PDF

68.9 KB Created: 2021-03-31 14:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ddc8ea6745360325e4711142902d6008 SHA-1: da4394234a2634c8a957f2f9ed01a715616b23e2 SHA-256: f2e479ed6bd7208b62e69b0362033f71dc98406d1cc2c16b183831227a110a07
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external URLs. No scripts were extracted, but the PDF structure itself is used to host numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/wix?keyword=animal+behaviors+worksheet PDF link annotation
    • https://cdn.sqhk.co/velabolo/dAmwQyV/hero_wars_tier_list_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/gasosivifug/gc8sjce/toxilido.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/25341142559.pdfIn PDF document text
    • http://lg-copyright.com/vepulilemupizi2r399.pdfIn PDF document text
    • http://usesoda.pro/war_of_the_worlds_1953_trailer40f7d.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/hehgbaV/razezut.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/5rjiQgg/dodizupawug.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/uiboias/std_10_gujarati_textbook_solutions.pdfIn PDF document text
    • https://fivosegexaf.weebly.com/uploads/1/3/2/6/132683078/6130918.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/UbfZjbT/url_video_player_apk_2020.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/vigugaruj.pdfIn PDF document text
    • http://gisujug.mypressonline.com/business_plan_for_small_restaurant.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/weduvuriv-kajugev-gebimer-kerewuv.pdfIn PDF document text
    • http://appletopshop.ru/tamil_advertisement_mp4_videohqgfy.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/frjjAhi/star_wars_jedi_temple_challenge_review.pdfIn PDF document text
    • http://khareedforosh.com/zuwunigovuwesojupojahksck.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_e4a2d0ed70a94edfb29df11559179b7e.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_3b633403a63545d6b73f0f3a98b89df4.pdf?index=trueIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_43566907a5294d66afdd410a35fd429b.pdf?index=trueIn PDF document text
    • http://varirojemixu.myartsonline.com/47087527413.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/86325439416.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_c5a1e0a791bb4d9d81e7d6faa8963e04.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/luvivebiweparetivudedar.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B0 5272 bytes
SHA-256: 856379da954358cf0dacb657d1028874bfdb466ede837a76181edacfa49e95cf
font_01_sfnt_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 10008 bytes
SHA-256: 9f13e3e727108783dc3f57f0889a9778ae3e6c00d99535d48c46d126c31ecf75