Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd4f52d32c35265…

MALICIOUS

PDF

72.4 KB Created: 2021-01-06 04:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d6055290c8dee52d6cbcaeb01ad7e1cf SHA-1: ef28a275f1e0e11a4bf1989c282438e6069b26a7 SHA-256: 5dd4f52d32c352658b241bfa41dd822a8f050f00ff86d6d0ca16a671deced97a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including one to 'traffnew.ru', suggesting an attempt to redirect users to potentially harmful websites. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious intent to leverage external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=golem+king+energy+crystal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458622/normal_5fb4fc46945b1.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/7haiihi/ledaxezomavefuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/fphj4b6/90789985141.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/GXhh7jh/skyrim_se_best_magic_mods_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f9cde1b95d28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469849/normal_5fc5d44ee85d1.pdfIn PDF document text
    • https://cdn.sqhk.co/xupotuferu/aHjegea/internet_en_tu_casa_movistar_mexico.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/jijez26/cara_setting_equalizer_headset_bluetooth_xiaomi.pdfIn PDF document text
    • https://faraxebeg.weebly.com/uploads/1/3/4/4/134475962/4741023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461481/normal_5fcd85615b43f.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/5342e24e-1d01-4640-930c-03b7a177029d/flippy_knife_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7619b9-26b4-41a5-bf08-346cc90426ce/selunikokerapetowekebij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b565a0-39c4-4771-967a-04a8676392e9/redige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4536afeb-cdfe-4b54-a759-02ed0f217560/67775507037.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_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5316 bytes
SHA-256: 2822cfa33f272c0b75de77380c7b56199bb91b347c488e822dc2a19bac3b9ed4
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 10120 bytes
SHA-256: d23452ea837cdab5c119e2de470fa5cd62eb8350df5bec2b10e9041045a09b60

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