Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6753695a94171e…

MALICIOUS

PDF

84.5 KB Created: 2021-02-16 00:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 37d2ce48adc11ad63a58f878d9d2594e SHA-1: 3fe5e9366718758ac2e610c266c3e803e41759f2 SHA-256: 9f6753695a94171e78948ad233f3cef63d75f84ab5417a315477ab58397b7873
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a domain associated with phishing activity. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a link farm on disposable hosting further supports a phishing or malicious redirection scheme.

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
  • 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://jottigo.ru/strik?utm_term=the+entertainer+scott+joplin+piano+sheet+music+pdf PDF link annotation
    • https://wavurujubatebar.weebly.com/uploads/1/3/2/6/132682053/jajasimogimumaxi.pdfIn PDF document text
    • http://ranefadosef.iblogger.org/kisefosoxowabose.pdfIn PDF document text
    • http://subfamjtii.site/57220826048fer8b.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/bengali_old_dj_song_pagalworld.pdfIn PDF document text
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/41b2e40.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/67ce3c98558390d.pdfIn PDF document text
    • http://coolstudent.space/nunitugubm9ecb.pdfIn PDF document text
    • http://garantiya62.ru/pfas_australia_guidelinesxfkgc.pdfIn PDF document text
    • http://dle-tpl.site/9390412067333h9p.pdfIn PDF document text
    • http://majelogajizivo.iblogger.org/ll_bean_flannel_sheets_twin.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/vuliwisuwig/wuxugovupigerotiwop.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/the_18th_brumaire_of_louis_bonaparte.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/mopijenozewawituru.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/ava_michelle_dance_moms_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/barnett_4x32_crossbow_scope_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/medical_interview_questions_and_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 5420 bytes
SHA-256: 44f3dbae830fd64f3ea46a238bc33db04727957222a9bd33226b82f8607c1992
font_01_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 11136 bytes
SHA-256: bbcf600559d3ec4c061eeb60edd99210aeddec429117c6cd07c93f566e379198
font_02_sfnt_off00012fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD4 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52

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