Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5b90e5a895a73a…

MALICIOUS

PDF

79.7 KB Created: 2021-01-11 06:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a929991520752f8932e0ebb272b8d50e SHA-1: 26c87a0b029f1d8b70156671a77077a6c4931613 SHA-256: ae5b90e5a895a73aa237de98b5a6981b13acc658479a55050fd5e17245bb9010
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs pointing to disposable hosting, with one specific URL being `https://trafffi.ru/123?utm_term=lifebelt+shark+tank+episode`. This pattern suggests the document is designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=lifebelt+shark+tank+episode PDF link annotation
    • https://site-1171105.mozfiles.com/files/1171105/strikemaster_24_volt_ice_auger.pdfIn PDF document text
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/b4462ee.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/xZhijen/51410987693.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/8352133a6943.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/jhfbeOA/96036709754.pdfIn PDF document text
    • https://site-1174882.mozfiles.com/files/1174882/51640797512.pdfIn PDF document text
    • https://site-1176758.mozfiles.com/files/1176758/wolf_protecting_girl_drawing.pdfIn PDF document text
    • https://site-1176302.mozfiles.com/files/1176302/midutupubuxe.pdfIn PDF document text
    • https://sivenusa.weebly.com/uploads/1/3/1/1/131164431/3e5698f86c19c.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/a86c45.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/6441432.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/ehbjcvH/traffic_rider_game_download_unlimited_money.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/vibasujefir/purodubap.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/varicocele_symptoms.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/7_badass_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/bonofojamaluwo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 5276 bytes
SHA-256: f76c4c9eea983e9de1bb07c2a213c414eeb64e894255b1b21d0109f2eb3cef0f
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 11476 bytes
SHA-256: 3f125bab638c1c7a8557c5dea05ad183a1afd45eff8d6dc017798e36a27bcac7

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