Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0962a7f2895138…

MALICIOUS

PDF

105.3 KB Created: 2020-11-11 12:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cda295437fa9a07c0053fa73f445815e SHA-1: 14af76afaed6ee16c9c433dfa92632a9b9f7683f SHA-256: 1e0962a7f2895138802dd48c152d8ec59d323949ed2e600b798e4b4b141cf1eb
186 Risk Score

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 0.9996

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://trafffe.ru/strik?keyword=a+clockwork+orange+film+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f920748d17b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f989209be6fb.pdfIn PDF document text
    • https://fofonameg.weebly.com/uploads/1/3/4/5/134522304/rapuvokofolu.pdfIn PDF document text
    • https://naxazutip.weebly.com/uploads/1/3/4/6/134610322/bikuxamevipo-zikir-jaxiki.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/xufitakikili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f9dd61d3a40d.pdfIn PDF document text
    • https://kaxalosenawa.weebly.com/uploads/1/3/4/5/134576513/japuguxi-girutexazijusa-wudasiroman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f9e4af2364de.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/nebabi.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/14afafba4d2679.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/7766531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00015bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD8 5620 bytes
SHA-256: c318f27d79622efab54239aa1d6f10101b2b1ec4e706b1d7b9604f2d0cda0afc
font_01_sfnt_off00016ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EF9 12340 bytes
SHA-256: 30be65ab6628da00dfe37508fecbbe7d2b1d664299032c1158e1826b99efbd38