Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9b4459e541d239…

MALICIOUS

PDF

74.2 KB Created: 2021-02-18 22:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a22274928dfdea743faa273e3af6b233 SHA-1: 6ce78c69bb837835b0306ddd556265cb6568eda8 SHA-256: 2c9b4459e541d239425847759f288aa1b919c03ae875b0b7f8815dbc8e0ab048
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The presence of 'cmdL' in the document text, alongside URLs, suggests an attempt to execute commands or redirect the user to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://maypoin.ru/strik?utm_term=phd+analytical+chemistry+jobs+in+india PDF link annotation
    • https://cdn.sqhk.co/wogokodu/j2gcmdL/my_cloud_mirror_download_setup_software.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/zufuvi.pdfIn PDF document text
    • http://jgndegs.info/alice_in_wonderland_short_storyy1siw.pdfIn macro / runtime command snippet
    • http://8gusevshop.website/160544094346qyu7.pdfIn PDF document text
    • http://prizinsta.info/download_dragon_ball_battle_of_godsfzbyw.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/zufaxeb.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/Fjgjhig/tied_together_switch_review.pdfIn PDF document text
    • http://osthondroz.com/bank_success_fast_preparation_book_free_downloadxouul.pdfIn PDF document text
    • http://cardioactiveufficiale.site/tesonakexemusednpmem.pdfIn PDF document text
    • https://cdn.sqhk.co/kowazodonaf/Jhggf1I/gunship_sequel_ww2_mod_apk_android_1.pdfIn PDF document text
    • http://goduvide.22web.org/42295487934.pdfIn PDF document text
    • http://qrastenmap.online/throwing_knives_no_spin_technique3qz79.pdfIn PDF document text
    • https://lofativunami.weebly.com/uploads/1/3/4/5/134581692/zovow_jibididututud_xubesan.pdfIn PDF document text
    • http://nakanilo.club/xujibeine4v.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/bHlAij8/wendy_s_bbq_sauce_calories.pdfIn PDF document text
    • http://womenit.space/836212765881p3sa.pdfIn PDF document text
    • http://quickpapp.online/popuzux4m869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 5496 bytes
SHA-256: a66b2d27dcffcd0bb19f8601fc2258bfd4bbbc11f74f214d64a650181b7ba844
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 10768 bytes
SHA-256: 2bf625191063a3e59ca802f2ad794f32806ffadaea691162aac5751ccf8985dd

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