Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fe479b574e85aa…

MALICIOUS

PDF

74.1 KB Created: 2021-02-12 00:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 63467f08f1fb3de786a644c720e71362 SHA-1: 677ba023d49a05ec5389aa93e76d50474143a7b1 SHA-256: a1fe479b574e85aa3e9204dd3f48a8193befc2feb2017a65c86881851fbd0c72
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. The presence of numerous external URLs, many hosted on disposable domains or link farms, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/123?utm_term=western+union+trm+form+pdf PDF link annotation
    • https://cdn.sqhk.co/sovokeduseb/ic8gewr/freaky_horror_clown_scary_neighborhood_escape_games_2018.pdfIn PDF document text
    • http://registrat.space/81900606392rv5dp.pdfIn PDF document text
    • http://voiprormul.xyz/opaque_beer_brewing_processd20jr.pdfIn PDF document text
    • https://bewogataxatux.weebly.com/uploads/1/3/2/6/132695278/2315241.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/gizabimapunujobagede56y9l.pdfIn PDF document text
    • http://bionatur.space/octopus_watch_alternativeav82v.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/xowilobuvoxewuzeto.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/gdjcQjb/fashion_cartoon_character_makers.pdfIn PDF document text
    • http://digitalmedialit.com/xojebaguregewitudumelout8t9.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/2239328.pdfIn PDF document text
    • http://filemarker.store/narrative_essay_sample2hu7n.pdfIn PDF document text
    • http://pozerebidilu.iblogger.org/34670398060.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/vanojebidutedeb.pdfIn PDF document text
    • https://bunixidulot.weebly.com/uploads/1/3/5/9/135964284/2051ca4d156c748.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/mozedijiz/muvasoriwudewunuguwote.pdfIn PDF document text
    • http://wikidupuzok.epizy.com/bootloader_samsung_galaxy_young_gt_s5360.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 4960 bytes
SHA-256: 15ed1490fa8522cb65f917970d39e028caf92ba8423d8b0e4a1a0365c7fe853b
font_01_sfnt_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 10504 bytes
SHA-256: ad258cf8dbce6e8628c63b545fc6bd35a903dded0988df336658e3ef5d11f927
font_02_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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