Malicious PDF — malware analysis report

Static analysis result for SHA-256 f788bab53f1db044…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 10:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fb938f421a8991bdc7f679de7e627f9d SHA-1: 059f0fe013764be66dce819744777426b9a95921 SHA-256: f788bab53f1db0442717781e549d318bee0476f45d8713a069d31e677eb83421
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious or deceptive websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/award?keyword=roomba+770+error+code+5 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387581/normal_6006ae41ecc06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_6006ae0d889a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_601be27e2e187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499633/normal_60075467d2221.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/560681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5ff31e0e79c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406466/normal_603c26fd72b13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fe04ec737f75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366360/normal_5ff64d8a0832d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_60077477920a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5fe40261e806e.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/xisakazelelinim/abbyy_finereader_5._0_sprint_free_software.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/87510745128.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/dinigipoloragovekafalif.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/the_compendium_of_physical_activities_tracking_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/how_to_find_probability_from.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/pearson_physics_20_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/tavufopemomin.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_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 5368 bytes
SHA-256: e430e9160b2e73b0b4150ba80f38011dfc527f2f8325592e37c1f868af854d82
font_01_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 10304 bytes
SHA-256: f1c68e8569b8570c3bd57d9ea79710b871275bc27d090167ca17c69e0de534ef

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