Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabb2b444dc156a0…

MALICIOUS

PDF

72.1 KB Created: 2021-02-11 18:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b1a1e1130e99b48961cea163c3312285 SHA-1: e7a194ae01a9aace00707b3b55b93c171f61d877 SHA-256: eabb2b444dc156a010b5bfa336503db23e21c3e8384f9c50f32e46e0290f9c34
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/123?utm_term=altai+hok+skis+used PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fce8c7807c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_6014e4b7df00d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_60039c6502e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_6025454d551d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401505/normal_6005cae485b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481420/normal_601d3bb84bb77.pdfIn PDF document text
    • http://azakalaza3.xyz/macmillan_gateway_b2_workbook_answers_unit_1l6wrm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_601b4464446cf.pdfIn PDF document text
    • http://lifeshop.pro/xadobuzixofisarunewovoxoo4i1.pdfIn PDF document text
    • http://svarka-aurora.online/zoboporekaxowedurio7c9i.pdfIn PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/bafewexit.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/betumefapukop.pdfIn PDF document text
    • https://nakakikixug.weebly.com/uploads/1/3/4/4/134490848/1e1abbea964cf.pdfIn PDF document text
    • https://wubudebekezame.weebly.com/uploads/1/3/0/7/130740051/mofetinibev-wibifomezele-domovojis-xojit.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/detiwijilugiv_tovajijuve_serupeluruwafo_vupumi.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/sefiwegegagu/zifaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/fundamental_of_analytical_chemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/b_m_application_form_online.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_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 4872 bytes
SHA-256: b75aef6a6ccb9542feccca7c91af73c7bdf95fdd83866e61ea9b8fa0b828172a
font_01_sfnt_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 10908 bytes
SHA-256: 91cf3bcf21c3282ce28e1611724c32b72e6560b56f526e179724f07c1452dbbc

Open this report in the interactive analyzer, or submit your own file for analysis.