Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdfe9bbc9682537…

MALICIOUS

PDF

77.1 KB Created: 2021-03-27 18:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a30a3269db3f6ff621f0f95d26e69a5f SHA-1: dab5994fcf09ef7f7de0ebd39c35e9f3299a8aed SHA-256: acdfe9bbc96825379474da13d2fe5ad4c8610fd507ec3a3807fc563bf01a7876
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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://gimoguvi.ru/wix?keyword=balance+general+y+estado+de+resultados+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494661/normal_6035b13b52e2e.pdfIn PDF document text
    • http://lighttravel-ng.com/philosophy_here_and_now_third_editionrscfv.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/ic3iaii/37172972633.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/dyiaKyk/simple_amplifier_circuit_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/hErjmuK/vujevirewowugidoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fe82adedd780.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/hhcighh/gixuwalu.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/screenplay_dx_hd_media_player_1tbhks2q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447273/normal_5fc903b74af5c.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/fhidBQR/cable_size_calculator_uk_12v.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/bgeigE8/digemesunepukedekaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/gihdii1/mawulojalojozedozevufiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5fd64b0da1ed2.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/46957263741l1nzq.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/icghhig/70s_80s_90s_music_free_download.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/push_battle_app6fq00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_6037de64454aa.pdfIn PDF document text
    • http://easterthjg.com/konawofobchlok.pdfIn PDF document text
    • http://instapodarok.site/novak_gtb_esc_manualtlwnj.pdfIn PDF document text
    • http://milanomodaitaly.site/47394208427b73m9.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/bjbhgaO/sikid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9801228e-5075-4297-9fd5-17300ab8f9f8/us_army_formal_uniform_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20b595b-d745-4f0d-8d06-d5e3d56eb9eb/what_are_non_destructive_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101a24c8-bb77-435e-a774-3f7fd7a98a24/weygandt_kimmel_kieso_financial_accounting_10th_edition.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_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 5324 bytes
SHA-256: d4874f1168e0b77d700302064debcbe6c8224ecf85b7898b70984dbb61263cc8
font_01_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 11296 bytes
SHA-256: 102a18407af990ca16ad0501a63e5c60a66555c166803da2be60ca660df54767

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