Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a2cc41081e6cf3…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 22:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 883ec34e6c919e841028f521c95c064c SHA-1: 0432c636aa959a16bcbab5094979bc0c2e3ec12e SHA-256: 95a2cc41081e6cf372dd8d2a38e6225ebe70edbbe699e1d6d034c67798ad0b8c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or credential harvesting. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing lure.

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/wix?keyword=frigidaire+professional+french+door+refrigerator+manual PDF link annotation
    • http://wordwild-store.com/sparkly_silver_eyeshadow_looksvpkq0.pdfIn PDF document text
    • https://muvuvudu.weebly.com/uploads/1/3/5/3/135351086/ef9bc40be43ed.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/2a6a3e1a.pdfIn PDF document text
    • https://xunatopek.weebly.com/uploads/1/3/2/7/132710497/mevobol_joludoxa_pipititure_tivanovuvetot.pdfIn PDF document text
    • http://golifidisonopat.iblogger.org/8137363260.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/fewax_xixiwepadoda_xadat.pdfIn PDF document text
    • http://usblighter24.site/253923987756jfhh.pdfIn PDF document text
    • http://zajifokabatu.iblogger.org/hacer_aviones_de_papel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://werexixudi.rf.gd/no_game_no_life_characters_names.pdfIn PDF document text
    • http://fezadup.rf.gd/formation_culture_champignon_de_paris.pdfIn PDF document text
    • http://vogizopenukese.epizy.com/80691956293.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/71017817963.pdfIn PDF document text
    • http://kuwajakuxoj.epizy.com/call_of_duty_mobile_full_version_apk.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/android_tablet_walmart_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/63779212324.pdfIn PDF document text
    • http://datupawop.epizy.com/titanic_theme_song_saxophone_sheet_music.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/dezimotisugunabep.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_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 5524 bytes
SHA-256: 4e4bf0246fac9a982b7af04f1e49474345a9fbe4eedae4a3b3092aa8d41349ae
font_01_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 10264 bytes
SHA-256: 7e64f0c2125f60bb778c1be7920925276444d317eeafa020c5870036b50782b1

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