Malicious PDF — malware analysis report

Static analysis result for SHA-256 922cae36e8b52be5…

MALICIOUS

PDF

69.7 KB Created: 2020-11-18 21:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6d5471597c85e940677e9faad5ae091b SHA-1: 0a708e7432223f67886595dab4bd15ec5b1ce497 SHA-256: 922cae36e8b52be5adb4668ca19397b20311645f10dc19ce8229b596d662683a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://traffset.ru/123?utm_term=1996+jeep+grand+cherokee+laredo+center+console', is likely part of this scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malicious redirection attempt.

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://traffset.ru/123?utm_term=1996+jeep+grand+cherokee+laredo+center+console PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5f94c72244f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_5fab7ef11281f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fa794be0fccc.pdfIn PDF document text
    • https://rifodomofakape.weebly.com/uploads/1/3/4/6/134627700/2985368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f8bd419ca09f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f933090be3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5fad307e12ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8d1a386f513.pdfIn PDF document text
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/pewupuriledud.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/tusog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f876686e12ad.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_off0000c7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B5 5740 bytes
SHA-256: 31d13b28ff19a2f15988eb54ab52c5b9ff330e439a4f79e63af1788866a819ec
font_01_sfnt_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 14396 bytes
SHA-256: ec81ab4fd2f36d38004798098cb0a9d1fe087895475975ac6c911335d95a4c07

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