Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7d01ddc68d36ad…

MALICIOUS

PDF

39.4 KB Created: 2021-04-05 07:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c2f6faf12254b3a59785836e7354469 SHA-1: 07e3f84271534b63d41023d24e257f8f60ebea0c SHA-256: 9e7d01ddc68d36ad3c2d19fe6f2798aff0f3d6f5b9e602e57b3a4aa266e02c53
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, designed to trick users into clicking a link. The primary malicious URL, https://crophysi.ru/award?keyword=pdf+annotator+5+download, is embedded within the document, suggesting an attempt to redirect users to a potentially harmful site. The presence of numerous other PDF links, many hosted on S3 buckets, indicates a link farm strategy to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7967

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crophysi.ru/award?keyword=pdf+annotator+5+download
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/2615500a6.pdf
    • https://cdn-cms.f-static.net/uploads/4416932/normal_5fe7b09427057.pdf
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/1af2ae67d7.pdf
    • http://photoforce.ru/lilefeditipakisinone4hc.pdf
    • https://static.s123-cdn-static.com/uploads/4406455/normal_60069f04e21b8.pdf
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/9568359.pdf
    • https://cdn-cms.f-static.net/uploads/4406782/normal_6056aa749a64d.pdf
    • https://static.s123-cdn-static.com/uploads/4486984/normal_5ff29747ac791.pdf
    • http://organicnu.info/4979160068617do4.pdf
    • https://static.s123-cdn-static.com/uploads/4482407/normal_60090cf2a83c1.pdf
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/2292473.pdf
    • https://s3.amazonaws.com/zuwimadaneb/18093501562.pdf
    • https://s3.amazonaws.com/gitipelut/93215191024.pdf
    • https://s3.amazonaws.com/dobesogum/69264980135.pdf
    • https://s3.amazonaws.com/kodipopujufipig/tofaturepimuwogugawuxonus.pdf
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_104e1d887ea7425da8855a9a83d8245d.pdf?index=true
    • https://s3.amazonaws.com/dukajevo/idsa_guidelines_pneumonia_hcap.pdf
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_4e7d25ce0c35468f887bc5e00ef34393.pdf?index=true

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