Malicious PDF — malware analysis report

Static analysis result for SHA-256 755a394e1e4cb70a…

MALICIOUS

PDF

75.8 KB Created: 2020-12-25 06:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 056c7e1e81a6eb200b61e3ab069b26ec SHA-1: b5db33f6d43be13813f3f0e1945b30076b660936 SHA-256: 755a394e1e4cb70ad6ef8c63ae3f9ddb5d4c44da83ff304259a1d75f30156514
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to an audiobook search, aiming to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=their+eyes+were+watching+god+audiobook+chapter+5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5fadabeb91b41.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/JL7UjaO/77431031064.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/iiaMQgc/tewekoritipo.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/YWSgegf/25320100486.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/hhgdjgG/russian_bilingual_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fe3610ec2409.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/jaFgiid/house_painters_tucson.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/9PhftQD/last_zombie_dead_hunter_sniper_shooter_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/UjNjbXt/newegg_return_policy_cpu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488335/normal_5fcb3b60afb88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5fc422012b4d1.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/jupevuxirapi/basel_ii_framework.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/bsc_zoology_syllabus_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d13c06c-66ee-42d6-af87-f46d79c9e9dd/86323612261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b322beeb-546f-47db-89bf-35342228e4b0/42987755650.pdfIn PDF document text
    • http://nelsonica.pbworks.com/w/page/25869035/Their%20Eyes%20Were%20Watching%20God%3A%20AudioIn 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_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 5772 bytes
SHA-256: 85695ffdaa9b7a11a6aa7742f3652e97570a639c31ff10c22a21ff92f0f1ee30
font_01_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 11268 bytes
SHA-256: 62c438e2ebe192d1aecee8b56a543ce1e87804e8da8722d7e666e772a90cf415

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