Malicious PDF — malware analysis report

Static analysis result for SHA-256 e726c23a4f00cdd6…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 08:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bfde2bf05e0cd32c2a1887c4832b14d0 SHA-1: ee695634ccc67b0f5849138571eb0429c494efa1 SHA-256: e726c23a4f00cdd6276f1828cb8d672bfd529a2b110bb7a2fa97625d567833cb
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though partially garbled, indicates a theme of 'how to attach decals to models', likely a pretext to disguise the malicious links.

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://nipisod.ru/strik?utm_term=how+to+attach+decals+to+models PDF link annotation
    • http://fagumawegoleleb.mypressonline.com/54246397844.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/gjjbngh/kikibu.pdfIn PDF document text
    • http://rfs.team/the_space_between_us_full_movie_freeus39f.pdfIn PDF document text
    • http://makeyourself.xyz/what_is_the_starting_salary_for_a_delta_flight_attendant572nq.pdfIn PDF document text
    • http://muslims.net/dexunozofotudomapaweb201i.pdfIn PDF document text
    • http://onlinekartiadesi.com/epson_surecolor_p8000_review0j95v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_601589e568dcd.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/las_batallas_en_el_desierto_de_jos_emilio_pacheco_resumen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_6047b76fac6a7.pdfIn PDF document text
    • https://busaluvugisegiw.weebly.com/uploads/1/3/4/3/134368440/powepibe.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hggcYja/83571839094.pdfIn PDF document text
    • http://bettermoneytips.com/57978297390dyyte.pdfIn PDF document text
    • https://divewamekavese.weebly.com/uploads/1/3/1/8/131860060/0ae7cd4b8bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jiwisi/bajitivuduwudeninete.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/aperture_shutter_speed_and_iso_guide.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/jexoresolomawetadado.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_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 5136 bytes
SHA-256: 5d707b40c112e95457a4905e92acda9aa1a31b4808a9ba1a3a9ef5d169eec4a4
font_01_sfnt_off00010f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 10800 bytes
SHA-256: f334228cd87874f5ea21d619e1a8732e1617631449e86f10d3c4a84d2bfe884a

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