Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49560c852df2f2f…

MALICIOUS

PDF

76.9 KB Created: 2021-02-27 05:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aca6398f457aac9a1bb4a5859e66ed44 SHA-1: bba9ce76aa5ea114cf2763bc4cb02ba7c2511096 SHA-256: d49560c852df2f2fd7387c7d87b8efd7eab84f992ed38adb2af04c3dae2d0376
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains text related to a printer issue, suggesting a lure to trick users into clicking malicious links. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or malware distribution attempt.

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://zajinet.ru/123?utm_term=epson+wf-3540+will+not+print+black PDF link annotation
    • http://abanca-electronica.com/32_rules_of_subject_verb_agreement3hp04.pdfIn PDF document text
    • http://apelsins.space/wamavutozufv7ja.pdfIn PDF document text
    • http://submonster.xyz/ad_topology_diagrammery7ghq.pdfIn PDF document text
    • http://dombitarf.ru/935326251809gy8t.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/f7gjhbP/3474674453.pdfIn PDF document text
    • http://gladkoe-telo.xyz/bilazemefubulapevrgjm.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/hauEjfs/vijoxif.pdfIn PDF document text
    • http://znatural.space/formation_agent_commercial_immobilier_pole_emploi0slo0.pdfIn PDF document text
    • http://itayoga.space/download_supersu_pro_apk_crackedwvazb.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/XKgez2H/xaropu.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/cUgctil/17873253643.pdfIn PDF document text
    • http://powezikunuzumi.iblogger.org/android_3d_video_converter_apk.pdfIn PDF document text
    • http://how2clever.com/share_chat_app_in_teluguoriq9.pdfIn PDF document text
    • http://fapseo.ru/4544622138e2nys.pdfIn PDF document text
    • http://7lessons.space/why_is_my_whirlpool_cabrio_dryer_not_getting_hot9rk1t.pdfIn PDF document text
    • https://cdn.sqhk.co/lunabati/gegexhd/battery_daddy_reviews_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/hdijaZa/zebenejesarigurodeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunixojojulif.epizy.com/71830734085.pdfIn PDF document text
    • http://kirogebi.epizy.com/math_addition_worksheets_2nd_grade.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_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5812 bytes
SHA-256: f0bda67aa346c8f790192e00eac9a6b908cb573c018b840a871016b41f44cc76
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10672 bytes
SHA-256: c98e742f3021e5b87a020eebea1edf3bd80ec4a726687854a09e3f3a3bc03c2a

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