Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdd11ddf81e06b8…

MALICIOUS

PDF

74.7 KB Created: 2021-02-19 23:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fec5be414cb380e0ee6e3b251a08b26 SHA-1: bf81395c0dab9c1c5c73cc43a8d9157e8c0d66f7 SHA-256: ffdd11ddf81e06b842a954a985537b252d3714eb6c8cad3710debbd241c122a2
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to known malicious redirectors, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to contain metadata related to the lure URL, suggesting an attempt to trick users into clicking the link. No scripts were extracted, but the presence of malicious URLs is a strong indicator of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=dead+cells+trophy+guide+psnprofiles
    • http://nuzabokazovuwa.iblogger.org/22843750157.pdf
    • http://ukranews.icu/like_father_like_son_movie_quotesca9b6.pdf
    • https://cdn-cms.f-static.net/uploads/4451368/normal_5fd110aa6a2c5.pdf
    • http://soluzixod.66ghz.com/16021102239.pdf
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fffb002c8a09.pdf
    • https://nutikatike.weebly.com/uploads/1/3/4/6/134601603/xiletapax.pdf
    • https://static.s123-cdn-static.com/uploads/4479462/normal_5fe44879723fd.pdf
    • https://static.s123-cdn-static.com/uploads/4390680/normal_60043e163f34e.pdf
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe21b5f41a8d.pdf
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fe81507c839d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://suwepedufaresi.epizy.com/26338454832.pdf
    • http://rawozenagi.epizy.com/black_and_decker_weed_trimmer_replacement_head.pdf
    • http://lolofekigosot.epizy.com/firebase_analytics_custom_events_android.pdf
    • http://wefexafunedex.epizy.com/61720915172.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e756.bin
79eb8dafd582a64aca6149e69301cc73853929e4f549051fd3e55548d2b9935a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5516 bytes
font_01_sfnt_off0000fa29.bin
94ecc2545a999985ec732e047f9b11ddd8663b962cb4e756faaa72a5049763a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 10412 bytes