Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f000dabfae8df01…

MALICIOUS

PDF

71.7 KB Created: 2021-02-02 23:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 945e4f0abf7e9a759cf0570ea632e6ea SHA-1: 3932f32dbc0b92e02e10dc29d908d07fb2d43591 SHA-256: 9f000dabfae8df01efbb533445a28c30abc1c65796ab77e0155ab7d102b2ecae
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with redirector infrastructure, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of attacks aiming to lure users to malicious sites, often disguised as legitimate documents.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=construction+cost+estimate+template+excel+india In PDF document text
    • http://olx-delivery.cc/gibazupt5146.pdfIn PDF document text
    • https://kapelivoxiri.weebly.com/uploads/1/3/4/0/134040857/vemipiselot_tukewanukiv.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/dMeWQhi/5300118814.pdfIn PDF document text
    • http://lnstagramoriginal.com/class_9_science_ncert_solutions_chapter_14vk16v.pdfIn PDF document text
    • http://ijmalan.xyz/81148078172dsowz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5fee00b2e3b72.pdfIn PDF document text
    • http://ecoservice-vlad.ru/farazupaxisemasudhkmuq.pdfIn PDF document text
    • https://divekoworubu.weebly.com/uploads/1/3/4/0/134017674/b38c724816c6d3e.pdfIn PDF document text
    • http://onlinesos.tech/detukotudu518.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/strike_force_arcade_fps_dominator_ps4y7240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5fd82626cf68a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fe802125139e.pdfIn PDF document text
    • http://womenit.space/xanulomebasuforibawifamnc9gh.pdfIn PDF document text
    • http://saudiautoinsurance.com/adolescent_psychotherapy_treatment_pbb4fp.pdfIn PDF document text
    • https://mosevulex.weebly.com/uploads/1/3/4/8/134860143/9040494.pdfIn PDF document text
    • http://ijmalan.xyz/learn_shona_language8mv7p.pdfIn PDF document text
    • http://matroskin.space/english_tenses_with_tamil_meaningwqw12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_60114415bd0f2.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/430751.pdfIn PDF document text
    • http://vwwv-avito.online/michael_r_solomon_consumer_behavior2j4n9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 5192 bytes
SHA-256: f3d02ffd599f939881e171bd12b7ce75769dee3315d25a884f82ab6938efb971
font_01_sfnt_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 10076 bytes
SHA-256: 4cb6a0c893be034a498d02e6aa7243431defe5ae04dcce1b76cf472bc0c4e4e3

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