Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe195f77a67133c…

MALICIOUS

PDF

91.3 KB Created: 2021-03-17 04:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 098af68292d5f09aac7f81aa186fdaf5 SHA-1: 8d92ec61486f6de39cd930066a121c44edb54b2d SHA-256: 4fe195f77a67133c59aa5c460f45c625e77915b12f3dc2678b4b9b698dc1842d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to PDF merging and wkhtmltopdf, which could be a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=fusionner+2+pdf+1+page+sur+2 PDF link annotation
    • https://cdn.sqhk.co/lirotigi/jbgj5jh/pefotuzevuboxogiduguwi.pdfIn PDF document text
    • http://interbankdigital.com/2005_chevy_malibu_ls_brake_lights_not_workingdodov.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/39299180192.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/gg8ibrM/atomic_art_relax_app_download.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/bangla_romantic_natok_3gp_videoclfjp.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/62921081978.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/karakteristik_ajaran_agama_islam.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/BgfwJos/fidexuvip.pdfIn PDF document text
    • http://electriccannoz.club/10179095503qtfsc.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/polynuclear_aromatic_compounds.pdfIn PDF document text
    • http://toppiksnack.xyz/ruzofaturov02a4b.pdfIn PDF document text
    • http://alcexpress1.xyz/177385524090szzv.pdfIn PDF document text
    • https://cdn.sqhk.co/rebosuvut/ghQL5JI/63314954065.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/HjjibdQ/mother_earth_brewing_nc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/93692039-69ce-4c70-a36f-c31965e45bb1/54105374396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d059e7-ad9a-49a3-ac61-ca3bc5a880dd/97021350125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0071a72b-f129-429c-b42e-5677bf740e56/nezenodexebozerikubosaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7654fdb2-1d78-492f-b827-70ec04d2897b/46275161144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb98384c-8add-4e3a-ae77-8178402341f5/88274663342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4fcc5b-6ed2-41da-9306-83c89b563298/how_many_carbs_are_in_burger_king_small_onion_rings.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_off00012398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12398 5316 bytes
SHA-256: 5245ae5c30efe3a219b62e16b123e5065c7a326039099d8f23737955a671f31f
font_01_sfnt_off000135c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C6 13428 bytes
SHA-256: 64591f10515518cd5d949c8beb165cc273c87e19cc55833b23f8d14f4536a921

Open this report in the interactive analyzer, or submit your own file for analysis.