Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbae244c56397e9…

MALICIOUS

PDF

152.8 KB Created: 2021-03-20 20:17:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: efd4990b8805c6515ca85ff63d6e8c8d SHA-1: 50652cc73c999a749df02bed1ae7d6ca1e1fe1c5 SHA-256: ccbae244c56397e93e5de8ef275a4151834953ed7cdbf415a7baf42f54d2aad1
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 0.9997

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://dugedepap.ru/wix?keyword=kinh+tin+k%25C3%25ADnh+nicea PDF link annotation
    • http://mixezitubut.mygamesonline.org/how_to_write_a_movie_review_format.pdfIn PDF document text
    • http://firstflirts.site/guzopekiromijibuzc69ho.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/oHhb1hb/nozinezozajonaxivokumaja.pdfIn PDF document text
    • http://new-volosi.ru/setuvizokujugogejujaxoxavkcpwm.pdfIn PDF document text
    • http://lazadacostumercenter.com/81167638212atv3m.pdfIn PDF document text
    • https://cdn.sqhk.co/wukibezoso/jahidFh/73381453031.pdfIn PDF document text
    • http://forpost-electrica.ru/822069204434nd0y.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/bidYcP5/10605677030.pdfIn PDF document text
    • http://com-signto2.xyz/vemexesakipilokupumebulixqmmif.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/skQgfgd/27063481271.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/S2iajiB/98495202799.pdfIn PDF document text
    • http://tihefers.online/vowel_team_worksheets_for_kindergartenkrra9.pdfIn PDF document text
    • http://hookup158.fun/personal_fitness_merit_badge_pamphlet_202029cip.pdfIn PDF document text
    • http://detonicinitalia.website/danexab9ib.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/tixedujegibex/fur_elise_music_sheet_clarinet.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/what_base_do_navy_seals_train_at.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/how_to_set_up_actiontec_wcb3000n.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_f4cbeff99d82417caedb8121edee4041.pdf?index=trueIn PDF document text
    • http://bototiluwoge.atwebpages.com/mot_udarowy_bosch_pbh_2100_re_550_w.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_30e131f3fc104dd4a913fa16a92aba60.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_off00020f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F90 4668 bytes
SHA-256: abd714cf0090bc8de668ee79def5ec39aacd881ad10b9e5c8cad315b97222769
font_01_sfnt_off00021f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F76 24448 bytes
SHA-256: 62e1ea575eedac9f975d15e4d7768b65464423daa52e3b5716a4f1938e10a02e

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