Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4cf9fdf27e7431…

MALICIOUS

PDF

64.9 KB Created: 2020-12-19 02:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ec26a56de071f5894cee5d86d0a9c508 SHA-1: 30800468ea244c13be1154958d10e062c5b3d48a SHA-256: 5b4cf9fdf27e7431bde5f85b6a5c18e9816456524b90759ee4a2678d15180398
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, with a critical heuristic identifying it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites like 'traffset.ru' or host further malicious content on platforms like Weebly.

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 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://traffset.ru/123?utm_term=ambit3+sport+manual PDF link annotation
    • https://bupizezar.weebly.com/uploads/1/3/4/8/134853483/72312e.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/jawemepuwiwifisuluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5fad561506d2c.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/kumugenivamido.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/dijeginaxet_jojavoma_zumegobudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b44aa5d-d8cd-4c3c-8655-2da14191841b/ceiling_fan_pulls_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/film_habibie_ainun_1_360p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45da34d-a249-4bc4-aace-08d877d94051/mcdonalds_crew_trainer_application_a.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/meeseva_obc_caste_certificate_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/14742822554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b83188d-9f0f-4b9c-813c-033576676e05/stanley_fatmax_450_amp_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/background_for_android_lock_screen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000adad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAD 5260 bytes
SHA-256: d3b9c1f3c3859fa8e476e75facf6aa4cde8f00991fee2262adcceaf14b024061
font_01_sfnt_off0000bf6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6B 9888 bytes
SHA-256: a275e5b8dc6cc43e0f25e5f09aa721ffcf0e2e0b460c904f5245c11e8ab5aba2
font_02_sfnt_off0000e16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16A 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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