Malicious PDF — malware analysis report

Static analysis result for SHA-256 9431461b36a880e5…

MALICIOUS

PDF

69.1 KB Created: 2021-01-19 22:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6c66cd9a06d1ce2e7523b16ca52f6537 SHA-1: 9eec9bc3f08d259e162308a235c06a1268fe6bc9 SHA-256: 9431461b36a880e5181a4edd2f92a265f0cceb5c2f827f41f3e67adbb7f294cf
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 0.9996

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://traffking.ru/123?utm_term=elements+of+dance+energy PDF link annotation
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/xepik-xovoto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fc7142d34863.pdfIn PDF document text
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/55ad003a29fc213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f8e97ecf0d6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484107/normal_5fded7000c508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378856/normal_60027dca15576.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/tesemewamu.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/6f5322b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461766/normal_5fb796e5da0a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5ff8adc9d543c.pdfIn PDF document text
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/ee51846.pdfIn PDF document text
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/fupujisupepe.pdfIn PDF document text
    • https://fenorepaxok.weebly.com/uploads/1/3/1/8/131856491/82fa2ad64cd39e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f8f56290f63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_5faacaec3a240.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/2b5662fa22129.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/2655c22f0418cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5fa9599eefea4.pdfIn PDF document text
    • https://jumuwaxenu.weebly.com/uploads/1/3/1/4/131406560/lumenozurazexefitur.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/wenigep-gukajelis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5febef0cf339b.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5400 bytes
SHA-256: 01492fd7363bd4877a84fffb71c030860f8ec0f0501ff812f9d60aee604e6ae6
font_01_sfnt_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 10256 bytes
SHA-256: 23e05479a4f5bf67cb51679ef309fbb6eb746fb08b37397426fce7f893d43b0b

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