Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e14f832fefbcd7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-25 16:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fbb7a880fad7e25bd2b25a3440da3c09 SHA-1: e852c9c39c18da8f12ec532b8d46746957f6f7f1 SHA-256: 01e14f832fefbcd7943a90d7c05a57712727ad3abc1b7e6f90eb4dc01cee60c8
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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 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://seumenha.ru/wb?keyword=sentence%20with%20long%20weekend PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489595/normal_6031f0bb47c60.pdfIn PDF document text
    • http://dalnoboyi.xyz/43414496574w7zzz.pdfIn PDF document text
    • http://adyga.site/cintas_uniform_rental_reviewsekmeo.pdfIn PDF document text
    • https://cdn.sqhk.co/tumitibira/jcJglEE/thrift_shop_online_cheap.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/mulukebuvif.pdfIn PDF document text
    • http://domodip.iblogger.org/s_kiu_truyn_phim_trung_quc.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/83789210944.pdfIn PDF document text
    • http://good-production18.site/95268679102plbdk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuteposidobi/fAV1hc7/immigration_and_nationality_act_section_212_e.pdfIn PDF document text
    • http://nipojugotav.iblogger.org/academic_performance_definition_research.pdfIn PDF document text
    • http://yoga-italy.space/maternity_leave_form_after_birthw04de.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jgghfHG/forexolajegu.pdfIn PDF document text
    • https://dinijituwit.weebly.com/uploads/1/3/1/6/131606252/2552771.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/voxulija/upsc_agriculture_mains_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/cambria_math_bold_font.pdfIn PDF document text
    • http://xogerakakirabip.epizy.com/63443831207.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/zaluxa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 4976 bytes
SHA-256: 4a7d7890ddbd4066f601dc5d4e2efbbf1bca4c84df103b0e822cf6320f58f824
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 10400 bytes
SHA-256: bd6555543e92b82ae4f85adeb7b1af71ba59baefdf586fb2991073280c5bb37e

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