Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a19f30ed7281cef…

MALICIOUS

PDF

74.8 KB Created: 2021-03-18 02:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17ee135f242a18cd1d578b1108ab7478 SHA-1: 545cee2fd253f27a6fbe254d93d5f31da97589d5 SHA-256: 0a19f30ed7281cef47259f54a3edcb10ec99ff6185dab41ad85ab18aad1173ea
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 0.9997

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://gimoguvi.ru/strik?utm_term=how+to+verify+land+documents+in+karachi PDF link annotation
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/kuluzifivisobe.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/jgggUgh/child_care_resource_and_referral_az.pdfIn PDF document text
    • http://introdom.ru/476624788960ksuz.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/hejdTz7/letterboxd_app_for_music.pdfIn PDF document text
    • http://gratoramaa.website/mapa_metro_sp_20203ivpp.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/hjqgcih/fuwigirolesetefosoto.pdfIn PDF document text
    • http://topstop.site/5334268197815ncr.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/2275718.pdfIn PDF document text
    • http://spainsale.pro/summary_of_novel_sense_and_sensibility_by_jane_austen234x7.pdfIn PDF document text
    • https://cdn.sqhk.co/xorakulenido/pgvqQQh/arduino_coding_basics.pdfIn PDF document text
    • http://govnosiakxws.online/snare_drum_sheet_musicu0f2l.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/jdE2sgj/89451870041.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/f4O9iiv/registro_brasfoot_2020_funcionando_atualizado.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/aia2tg1/onmyoji_pvp_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/mhicjge/asteroid_belt_name_between_mars_and_jupiter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_7b8092dfacf843119cbad7543135429c.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_bde601718ccc4d24a56c7675d91129ce.pdf?index=trueIn PDF document text
    • https://c5b3e1fc-3b55-407d-a8d9-2bfa6c9015c1.filesusr.com/ugd/6df244_b52f63179c0f4c129fb96c986030e2c5.pdf?index=trueIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_9f7bd11725614f2099108df874fceccf.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_674cdbf7722440c0982f4be7fa6d7729.pdf?index=trueIn 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_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 5540 bytes
SHA-256: 8382646765564cc077ccf2a87258197aa1d5efd215e7f9794f85407fa798ad03
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10836 bytes
SHA-256: 25349b24ddcdb6d5cf7969da6c3601d66e3ea243a5ca4fa0dd92d2fbbf2b0f95

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