Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e9584405d4e5dc…

MALICIOUS

PDF

65.9 KB Created: 2020-11-11 22:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b079acfe48b9c4034562f476f1cef276 SHA-1: 2a65a69ba933dc578d4a0e2968cadb26cfedee3c SHA-256: 63e9584405d4e5dc0eb0921c4968ecf7e5a935e465bc8ae79557ea9369f07b93
164 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. It uses an urgency-based lure. 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 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/123?utm_term=adobe+acrobat+xi+pro+serial+number+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5f9ed0e42abea.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/3081215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5fa4ed0c80a99.pdfIn PDF document text
    • https://senokolar.weebly.com/uploads/1/3/4/6/134628648/483ac55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f9f91a805ec5.pdfIn PDF document text
    • https://fujireroxilurig.weebly.com/uploads/1/3/4/6/134649353/4f17385b.pdfIn PDF document text
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/21ea35bbf1c.pdfIn PDF document text
    • https://tubomomumaxef.weebly.com/uploads/1/3/4/5/134508744/zosubedogagenunixe.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/wekibik/mercado_bursatil_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/myocardial_infarction_pathology.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/59154004846.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/munusu.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_off0000c5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CA 5576 bytes
SHA-256: 25185371aa84dcfa4b27bea80b2b179be6f4a19d46483c662fe6c9fb8bfbf5b7
font_01_sfnt_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 10116 bytes
SHA-256: e315e76abebd52c10e20ce33adf9fba5868dfdc3c740905a80f4ea911474fb20

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