Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdb5f9cd5804508…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 23:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c866f94ae9d7fd2fcd1015592566fb0f SHA-1: 73f03139674cbe8b6e5c55a9e6b56337a3c8ac21 SHA-256: bcdb5f9cd58045081936822a2f5c2f73a2b0723ce3a340f67202ffae33296d1f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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=which+is+the+largest+and+thickest+layer+of+the+earth PDF link annotation
    • https://xonajuximo.weebly.com/uploads/1/3/5/3/135311854/80a64d3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465719/normal_600a19f82b37e.pdfIn PDF document text
    • https://tafugamukizigip.weebly.com/uploads/1/3/0/7/130775106/1791b38a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_601a9f621345c.pdfIn PDF document text
    • https://nupinegudoxaxu.weebly.com/uploads/1/3/5/3/135350485/4742271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5fcaaa6ded5fc.pdfIn PDF document text
    • https://kufofena.weebly.com/uploads/1/3/4/5/134504524/pekosiw-kubiko-lotedogiku.pdfIn PDF document text
    • https://numemepo.weebly.com/uploads/1/3/0/9/130969514/ramotajekujoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_60136a600aa47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470526/normal_6046263377e5c.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/60820832e16aa4.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/xomotiw.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/3209711.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/671799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiduro/ablebits_add_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3111720c-b1b5-4f08-a845-99637e73f0f4/14373137101.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/alessandro_vilas_boas_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/najefujororeno.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/vision_in_arthropods.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/half_imperial_sheet_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/89608800771.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/modern_warfare_3_remastered_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add96f46-c598-492f-99fc-893d0d93cedd/what_should_i_check_before_buying_a_new_car.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 5460 bytes
SHA-256: 7e8f8efc2d6a0d502ce0453dc24f98bca3bcc5e865f238a9f6b5f66d95626436
font_01_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 11080 bytes
SHA-256: 5cac69caaed9bf5ae1dbce02794b2e42c2f1d3a4721b7b1ccf34d3e02be9e101

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