Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa606802001d78ef…

MALICIOUS

PDF

76.0 KB Created: 2021-03-01 11:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3364ddaaa6d48ba96ea686c6ebdee546 SHA-1: b4f936fdfd14535362f455a0ca55a5da935578fe SHA-256: fa606802001d78efe391e70aa1d8cbab7acbfbdc19fbe00b5f2df6f3d8724075
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains numerous external URIs and is structured as a link farm hosted on disposable domains, strongly suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics indicate a high likelihood of malicious intent to redirect users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/123?utm_term=keurig+2.0+needle+cleaning+tool+walmart
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/39da613.pdf
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/nulumowupat.pdf
    • https://gebogezajir.weebly.com/uploads/1/3/4/6/134685536/7873607.pdf
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5fcc25f7809ab.pdf
    • http://xedeporib.medianewsonline.com/philips_norelco_multigroom_5000_review.pdf
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5fcc03ca30a67.pdf
    • http://it50discount.pro/converting_inches_to_feet_worksheets_3rd_grade5fmjh.pdf
    • https://cdn-cms.f-static.net/uploads/4483071/normal_6032b55c2532e.pdf
    • http://mpvideo.org/mugonolorejitanp24ln.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vorisenunajix.myartsonline.com/how_to_stop_time_jotaro.pdf
    • http://widepidaba.atwebpages.com/24700392963.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_off0000e982.bin
dd2fe9f2e3057e370faefeb354fe10f98d455560256b3c7c92a1d7c7e82644fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 5448 bytes
font_01_sfnt_off0000fc15.bin
44c8193497bde3911bdc956f39935132985513656f7316729b0a44fb584ba2d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 11556 bytes