Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6501bbe98ba0eae…

MALICIOUS

PDF

100.1 KB Created: 2021-02-12 12:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 20948d53d00702d27b23094fa3f3cc4a SHA-1: dbebc81382eea97700a10b04af571f4aa1071a3e SHA-256: d6501bbe98ba0eae8d4833d7750ffb4d3ff8a60c41112c90cd8b6a25346d4a35
126 Risk Score

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 0.9998

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://baarspo.ru/wix?keyword=wow+shaman+leveling+guide+classic PDF link annotation
    • http://mklhhhh.space/mopumulebonus5l0wq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_60115d281c045.pdfIn PDF document text
    • http://strapslap.online/421953508291ujgu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_5fe6caca104d6.pdfIn PDF document text
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/midekofafo_wurijosuk.pdfIn PDF document text
    • http://itwomen.space/descargar_motorola_pc_suitel0wig.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/zesusi-zivuliwutasal-tativigavo-fomun.pdfIn PDF document text
    • http://front-glass.space/easy_chocolate_cake_recipe_without_egg_and_ovenk35m4.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/924984.pdfIn PDF document text
    • http://leoidet.xyz/streamlabs_dashboard_not_loadingxfzdz.pdfIn PDF document text
    • http://tipografiyav.moscow/48760871163jgnli.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/31715751518bn35r.pdfIn PDF document text
    • http://importants.space/blob._io_server_apkjpu3l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5ff0f2dfbcaac.pdfIn PDF document text
    • http://yoganchik.space/guile_theme_saxophone_sheet_music7slq4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417327/normal_600576c825d04.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/gusanobez_jeduxiz.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/xasovewipeje/pitutebuwur.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/jomokijogorozerud.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_off00014ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE9 5424 bytes
SHA-256: 0ac9720fcaadefc1562d1d6d2932a2762fa36bb12e3a459b7e80f36cafc9502a
font_01_sfnt_off00015f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F54 10364 bytes
SHA-256: ef36612ba0b632bd7baab47f89cf16d816c8bb09b7ba4399164dac7902750bb9