Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f7186c23006307…

MALICIOUS

PDF

72.8 KB Created: 2021-01-12 05:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9653529726a68b3dcf1d674464f3a698 SHA-1: 80081d17c9905afdab592b6ced98631f44604b70 SHA-256: 72f7186c2300630735df0c6474a296b4d7ff5f6d13ded8f82fedd28759937f4c
184 Risk Score

Malware Insights

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

The PDF contains multiple links to disposable hosting, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference a '2018 harley davidson service manual', suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the PDF structure and link analysis strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=2018+harley+davidson+service+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5ff96d9b7fa75.pdfIn PDF document text
    • https://site-1204352.mozfiles.com/files/1204352/zapavekebisapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_5f974aa036be3.pdfIn PDF document text
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/6068155.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/gjgighh/92131403723.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/sexew.pdfIn PDF document text
    • https://site-1196452.mozfiles.com/files/1196452/94731568482.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/ketesemixudi-vusodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5ff4a6a619b2b.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/gazijewevan/world_competitiveness_report_2018_imd.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/who_carries_out_the_laws_in_dictatorship.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_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5764 bytes
SHA-256: e86bc18603e047b3364c0889a05d4b751dfe2ebb1585619cb785c282e36d73a7
font_01_sfnt_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 11992 bytes
SHA-256: de33fa896bfeafae4d1be4b088f0579d3c545b2032f363524c8a2aceb15b05bc

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