Malicious PDF — malware analysis report

Static analysis result for SHA-256 76862f2ff7d02317…

MALICIOUS

PDF

84.0 KB Created: 2021-03-23 11:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec2b1a3d3e470973f286977bac51fbac SHA-1: 59448ff2c1d50e45c628f9872b3e31f08cf2bf97 SHA-256: 76862f2ff7d02317a95f5b6ba88a6e5399f3ab08f7e07b7c5ccdb970760b9ce3
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://jacksth.ru/strik?utm_term=south+beach+diet+reviews+reddit PDF link annotation
    • http://mnogoturov.com/toyota_corolla_android_carplayspq32.pdfIn PDF document text
    • http://vugijow.iblogger.org/92786704638.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/jigeH3h/dude_perfect_youtube_channel.pdfIn PDF document text
    • https://xixotileko.weebly.com/uploads/1/3/4/0/134018517/7914177.pdfIn PDF document text
    • http://umkatrade.ru/lutowosavezonugiwadhgyi.pdfIn PDF document text
    • http://form-copyrightservices.com/direct_speech_worksheets_for_grade_78sh12.pdfIn PDF document text
    • http://vedanejoxi.iblogger.org/cisco_ccna_200-301.pdfIn PDF document text
    • http://uber-global.com/infected_ingrown_armpit_hair_picturesqjkmt.pdfIn PDF document text
    • https://jazebaza.weebly.com/uploads/1/3/4/6/134662006/vopijawijororatu.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/ef966.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/vmfifuu/best_way_to_get_voice_search.pdfIn PDF document text
    • http://pushbiz.fun/851061013859k5iu.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikifabaf/CfifjbH/69201904963.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/9a4a04771626a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzidasore.rf.gd/account_format_balance_sheet.pdfIn PDF document text
    • http://tebafifara.rf.gd/league_of_legends_repairing_stuck.pdfIn PDF document text
    • http://nizapowedasa.rf.gd/reporter_la_date_de_livraison_en_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f416e18b-f362-4002-b5e3-9a6bf9981bd6/mivalazifepefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a5fa8d-1670-4efa-9758-c80fe04ab9e3/jigagokajamafewotolomex.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_off00010934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10934 5388 bytes
SHA-256: d9609a80e6feb62713b262de9f38383dc1a9d6ef8a778506806200ddee8fb98d
font_01_sfnt_off00011b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B92 11692 bytes
SHA-256: c6466f8ddc9de45ba01a62c20c7327e3937cea563bf9d4b3d214d9686746addf