Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e6c5d841c41e09…

MALICIOUS

PDF

64.3 KB Created: 2020-11-14 03:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e608eaa47b4454d8910828c0e2b78fe5 SHA-1: 926df5b2db0a540d662885a38929a3a3b7354069 SHA-256: 12e6c5d841c41e092eacccf98010e7443c609334cd82fe097b2ec64af48d80f0
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 0.9997

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://trafffe.ru/123?utm_term=wesco+pallet+jack+parts PDF link annotation
    • https://vavagufone.weebly.com/uploads/1/3/4/3/134345741/577470.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/9348719.pdfIn PDF document text
    • https://mawanegofarate.weebly.com/uploads/1/3/4/4/134466522/paxemidazevunixuxuko.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/juditibamepakoxivuze.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/duxakinisa_najalub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f8f8aa-082a-4332-b808-1d85b78124cc/54518202.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/lanshan_2_tent.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/83761684069.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/limajabov.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/after_2_book_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/kniess_mini_golf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A9 5080 bytes
SHA-256: 86a7d30166cdd08f9efbedaacfec6c4cd10b9ee43d4a61035b72584488222351
font_01_sfnt_off0000bb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB19 10284 bytes
SHA-256: 8681d7598aba041293a6ed4f7047fe12f137c999569c739c0fb00959552255c0
font_02_sfnt_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 16312 bytes
SHA-256: 2d7627107930e6e1f62c7b8d8140e0ad17013bbe84e037662a136d0d9feac58d

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