Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f9031636a97709…

MALICIOUS

PDF

78.7 KB Created: 2021-02-28 08:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 54cc12a88bb63dfbfa72ed2ff4292df4 SHA-1: 25823e5a9e2d60c69a56d1b447bfba501b1ffaa4 SHA-256: 05f9031636a97709f70a9ae970ec4c7726656361393e6dcd67665ad0c3e66378
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, appears to be a lure related to '48 laws of power audiobook download', directing users to a suspicious URL.

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://baarspo.ru/award?keyword=48+laws+of+power+audiobook+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5fd0a0bf4e07d.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/njcyWZd/sesepufisuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/hcEjdgi/77519759630.pdfIn PDF document text
    • https://cdn.sqhk.co/vujalenan/fgiRchb/87983837422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374689/normal_5febda58e3539.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/julojilek_tupenarafuxomu_sizesazijew_wugemi.pdfIn PDF document text
    • https://rakerekibakefe.weebly.com/uploads/1/3/4/5/134596095/jimazakiwasinukanaj.pdfIn PDF document text
    • https://jupufafel.weebly.com/uploads/1/3/2/7/132740723/zekurof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_5fd95ad8adbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_601de517088c7.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hhbDifm/jibotajaxugezefanafaf.pdfIn PDF document text
    • https://juvikawupuw.weebly.com/uploads/1/3/1/4/131409017/18a0dc4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_6036822b8da78.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/lisirige-beraseruzafe-biwigarok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tomuvonunilo.epizy.com/troubleshoot_insinkerator_hot_water_dispenser.pdfIn PDF document text
    • http://sakikuzugodo.rf.gd/idiot_test_4_answers.pdfIn PDF document text
    • http://jaberorer.epizy.com/63713542843.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/spider_man_unlimited_apkpure.pdfIn PDF document text
    • http://zufonokimilije.epizy.com/n1_mathematics_books.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_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 5516 bytes
SHA-256: eaba89fd3990e4e08933cb24f92e3f62f989a5be0d330504970af741afa1b33b
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 10436 bytes
SHA-256: a09c09171af1676370ae1a7b4affe9fbb60129533364811fb2aa0647a23782f8

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