Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae0912da3a64a47…

MALICIOUS

PDF

147.6 KB Created: 2020-11-10 12:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7aecdba7cdeb5cc45d8c627f96b09cd9 SHA-1: 840e6836e705d960e420ac0769b9b4855b504ea6 SHA-256: aae0912da3a64a47d98dfce184bbcf0134a753e9fbaf9713d208fc62c674ac62
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=vulcraft+steel+deck+manual'. This URL is likely used to lure victims to a malicious site. The ML classifier also flagged this PDF with a high probability of being malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?keyword=vulcraft+steel+deck+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8f45df1a49a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5f9ea0cfa7078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f945e834ab07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f941bc883821.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/zerepuzuze/uc_browser_apk_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d1149d-fac4-455b-9784-ebe281444de8/84742589300.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/belfast_confetti_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/9119157922.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/pofunasufiposerebi.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/hebron_avenue_school_glastonbury_ct.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/37753831223.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_off000207db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207DB 5196 bytes
SHA-256: 4220f1e39ae16c366c34178758735dbeddad9c4ce9df1b86866bcaa85b88606b
font_01_sfnt_off0002197a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2197A 11692 bytes
SHA-256: 694d68f3f499235b458eb7efb2b89fffb5849d12428fae097a8bff7f3ad08140