Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabd4341472479be…

MALICIOUS

PDF

75.7 KB Created: 2021-04-02 01:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ca75029c84d42accb594cf4dbe7907f9 SHA-1: 13273bf89a959725f12a865f8fc01756f5c1bcbe SHA-256: eabd4341472479be57683d2013c708bb1c71feb22ec55cce07abd5607c019960
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/award?keyword=srimad+bhagavatam+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/bimonabozo/ge2iegj/us_civil_war_1862_battle_site.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_5fd319a78672c.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/AgfQKF8/33595725649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_605489a9e6814.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/ifIidhh/kodiak_alaska_weather_november.pdfIn PDF document text
    • http://jurabosuw.22web.org/poxoselajulonotiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcebb98f1f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_6065290f94323.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/fWgcwmr/rorujixararetid.pdfIn PDF document text
    • http://zuzumolimisugu.22web.org/17589257588.pdfIn PDF document text
    • https://tobuveforo.weebly.com/uploads/1/3/0/9/130969072/aa6b12f22686f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_60413a3e740ec.pdfIn PDF document text
    • https://notozovurex.weebly.com/uploads/1/3/2/8/132814393/vatotutomifeje.pdfIn PDF document text
    • https://sofeparevik.weebly.com/uploads/1/3/4/5/134517226/zefesak.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/ibRjhsb/leliru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://razivud.epizy.com/39329031342.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_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 5672 bytes
SHA-256: 9fee724e1bd04d3c7af40cfd601e4b887dbf7fefbf5bed626f79fda94feb3326
font_01_sfnt_off0000fb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 11620 bytes
SHA-256: f8ac82bcddd481206b748da174f893759dcafdd8eacb3940eb3dcedd2988f5a3