Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0467dad33b1f91d…

MALICIOUS

PDF

70.3 KB Created: 2021-01-26 14:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1259e2dba75e1c1b6af81f5eec2f9ee5 SHA-1: dd91a3d186989ef94ba27b66ec95fad7ee609a6a SHA-256: b0467dad33b1f91deea565ac6ced48f335aa3d41f50d32a03294d7c85122369b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to mimic search result snippets, suggesting a phishing or scam attempt. The presence of numerous links to disposable domains and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffmen.ru/123?utm_term=jordan+creek+movie+theatre+times In PDF document text
    • http://pubguckazan.com/does_maze_die_in_lucifer_season_5uwxec.pdfIn PDF document text
    • http://letnesil.xyz/nututimezogias059.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5feead5fb16b4.pdfIn PDF document text
    • http://ourfanz.com/29419603843ximeo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fdad5d3f2bab.pdfIn PDF document text
    • http://souve.me/boulangerie_patisserie_epcotvq1ej.pdfIn PDF document text
    • http://wordwild-store.com/rijodalavevoxewedoyaimh.pdfIn PDF document text
    • http://cmb-accueil.com/54177607621nnqa9.pdfIn PDF document text
    • http://50offshop.pro/79406840666lnslq.pdfIn PDF document text
    • http://lojasamericanasbr.com/my_cloud_home_personal_cloud_storage_4tb8n8uf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5ffaabecabcda.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/jimugivos/gedugovug.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/mubadizisetobiga.pdfIn PDF document text
    • http://biwodonugawodil.rf.gd/tuzanexubasivikus.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 5

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_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 5260 bytes
SHA-256: 80fdf5a94e9cb74c07d8140b0685704313aeedb8c25752218dbc24bea4aa38bb
font_01_sfnt_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 10408 bytes
SHA-256: bcee4e0df8cc7188763462132db06f67c7a945bd525e891c617e3f3b760ef4e4

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