Malicious PDF — malware analysis report

Static analysis result for SHA-256 24702baa2c128ed8…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 18:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1da1b52721978f4a01383fb76d7e2aa9 SHA-1: 7778eb59b6041c8b6b9c873e87a5e5b7e79b3eaf SHA-256: 24702baa2c128ed8ec393d9cf90015a9e1b843929508aa84a7f3c055c109b8e3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly and Epizy subdomains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF's structure, including the 'PDF_SEO_LINK_FARM' heuristic, point to an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=kidde+hardwired+smoke+alarm+with+battery+backup+3-pack PDF link annotation
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/e0c6a186b.pdfIn PDF document text
    • https://jesabison.weebly.com/uploads/1/3/4/3/134379325/mipid.pdfIn PDF document text
    • https://kafijojiwagovi.weebly.com/uploads/1/3/5/3/135387916/koxuduvinelonom.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/d80e9ccc4ad19b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodagid.epizy.com/patekirotalawoduruz.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/speed_calculator_gb.pdfIn PDF document text
    • http://tadukaxuzevida.epizy.com/40052840055.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/can_you_solve_this_puzzle_30_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/lemony_snicket_books_who_could_that_be_at_this_hour.pdfIn PDF document text
    • http://xelopin.epizy.com/boxokademefitom.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/pictoword_level_149_answer_key.pdfIn PDF document text
    • http://kopunumepoz.rf.gd/will_cyberpunk_be_good_on_ps4.pdfIn PDF document text
    • http://luxolonowo.rf.gd/value_education_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/radiological_physics_book.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_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 5876 bytes
SHA-256: 3e18e9431f37e971c7d7a75bb35ae6a93e225db69b9fc066bd37ce7dc7d3b7cc
font_01_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 12936 bytes
SHA-256: b3e757482a81f00ee033dee7da4d36c6c69f8f771875e08add9c6ef5b0d75521

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