Malicious PDF — malware analysis report

Static analysis result for SHA-256 654a648f3aaa43b9…

MALICIOUS

PDF

71.5 KB Created: 2021-03-14 16:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bb26adb960eba0e5819be7832eacd046 SHA-1: 43d9ff87de65c45f9e8f735e547287947be3adce SHA-256: 654a648f3aaa43b9ebe0ecaaa961f00ba33084be647f0f2eda2a6850d7287393
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to potentially harmful external websites. The document body, though heavily obfuscated, contains references to search terms like '3d animation definition pdf' and is associated with numerous external URLs hosted on disposable domains. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=3d+animation+definition+pdf PDF link annotation
    • http://leledup.mypressonline.com/is_wendys_breakfast_sausage_pork_or_beef.pdfIn PDF document text
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/6546893.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/fiwugomixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_5fd84d5166094.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/bM8gghg/78389657727.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/5158731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5fe9b5db751a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473359/normal_5fe0366767825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482018/normal_600220cf7d997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5fd7f6f9f2c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528959/normal_6042ded384982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6019102b6ed03.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/gWjbGNX/drill_master_rotary_tool_kit_for_nails.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/review_schwinn_ic4.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/40b91d50-33a8-4b62-a555-4db385d8814c/how_to_fix_air_conditioner_fan_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff9ea3e-e855-41e0-bc70-a1ae0aae895a/how_to_get_ripped_arms_without_weights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d94f12f-aef8-4c7c-8921-b585e029e899/what_is_the_difference_between_lancets_and_test_strips.pdfIn PDF document text
    • http://nononulavojiki.myartsonline.com/ielts_liz_reading_tips.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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 4948 bytes
SHA-256: 7d31e01a554be8e44736afbce6ecec0b4f36d156cc6802cfd0652e7d9cc171e6
font_01_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 10208 bytes
SHA-256: 643b8ad39534729babaee001588b6a1fa005b6ea57fee517dbc490dd499af72c

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