Malicious PDF — malware analysis report

Static analysis result for SHA-256 494a8677fe8411ad…

MALICIOUS

PDF

85.7 KB Created: 2021-06-08 12:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1e29f4f1fe9ac81b25592fc9a70b5877 SHA-1: 584e547362b1cd4f8baa78b7abcfc590bc9b8287 SHA-256: 494a8677fe8411adc3157c88aefa4666ab7299c558096120a623a685ec600977
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://philabc.ru/pbw?utm_term=movimiento+rectilineo+uniforme+en+fisica+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456985/normal_600488bdbe281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_6031eaf223c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_605b4ce718f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_6015eab257a47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5ff03ae74809c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_604d9f8700fcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupowivala.pbworks.com/w/file/fetch/144803439/wonetezuxivel.pdfIn PDF document text
    • http://xanovobuxebo.pbworks.com/w/file/fetch/144792345/68396243183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbd60b8-095c-443e-b6c1-1d4de4e97896/38098883695.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144617565/nasm_essentials_of_corrective_exercise_training_free.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/what_is_regulatory_reporting_code.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/f/zetozuwi.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144825828/algebraic_equations_examples.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144586143/pojirezipujojarogozi.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/f/how_much_do_ryanair_pilots_get_paid_uk.pdfIn PDF document text
    • http://finepade.pbworks.com/w/file/fetch/144787278/what_is_the_range_of_a_tesla_model_3_long_range.pdfIn PDF document text
    • http://subazim.pbworks.com/f/9915974129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33651f3-c705-4b33-8464-59194c29bd39/nedejatogewu.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_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 5368 bytes
SHA-256: 96b6e121c8c5530f23598b12f4e41df36ced46213c5368890ca19204c1fbef5d
font_01_sfnt_off000121f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F0 12004 bytes
SHA-256: 8014633cbdeff3ac4f3b975f79fb7e254198d55d55be941bfd5a31ac104fafb9

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