Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d9f6a110fe314f…

MALICIOUS

PDF

128.3 KB Created: 2021-02-28 15:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae84b2365fe4501b4704967e17707184 SHA-1: 702824cf7b154cf7cdf5f51f42ecce9c0eb56942 SHA-256: 48d9f6a110fe314f5fcfe307123ec024c2657d9c2b78abbfebf6a3d78d523f5f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site, disguised as a search result for a historical court case. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as a phishing trojan. The presence of multiple suspicious URLs suggests a campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://resalured.ru/123?utm_term=what+is+the+brown+v+board+of+education+case
    • http://a1metromovers.com/341253284337ymdx.pdf
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fd5fff951281.pdf
    • http://fevinoreniwelik.sportsontheweb.net/aci_301-99_specifications_for_structural_concrete.pdf
    • https://cdn.sqhk.co/pezolaje/sIGibFJ/jogatazaxotujesute.pdf
    • https://cdn.sqhk.co/kuzefoke/jiKcgdT/famous_quotes_from_democracy_in_america.pdf
    • http://3203epworthcres.com/pitosexovozepukejed3n4no.pdf
    • https://cdn.sqhk.co/buwaxaxodi/VAij3mu/single_phase_circuit_colors.pdf
    • https://cdn.sqhk.co/vuranataxu/ii9OR3a/13051179635.pdf
    • https://cdn.sqhk.co/luwokiseg/b5eieJQ/71674207626.pdf
    • https://cdn-cms.f-static.net/uploads/4481280/normal_602b6e88282b5.pdf
    • https://cdn.sqhk.co/raxinosi/jzhc8ji/ripajesasaruzagebewuz.pdf
    • https://cdn-cms.f-static.net/uploads/4401515/normal_60262a6119b5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0001b9da.bin
f49046cd559111a08bba7793eb39fd856b9a92d1b4712c46c9024b4bafe7c853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9DA 5384 bytes
font_01_sfnt_off0001cc3b.bin
71abef4e870017e2cddff28e66cc31ee6958c8fda84e3a45697d4e2aa2b44ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC3B 11620 bytes

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