Malicious PDF — malware analysis report

Static analysis result for SHA-256 2989d613c81392fc…

MALICIOUS

PDF

76.6 KB Created: 2021-02-08 04:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 056520391edacec15820ef42a9865584 SHA-1: e96b8c600b44f69f076a64335fc61dc9307586d7 SHA-256: 2989d613c81392fcba0120d22dbe43ed3afd4df376e8a25ad90020b903d37273
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farm heuristics points towards a spearphishing attachment vector, likely leading to further compromise.

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/aws?utm_term=conflict+minerals+reporting+2018 PDF link annotation
    • https://cdn.sqhk.co/buzodafevuj/ohgibhg/call_of_sniper_war_2020.pdfIn PDF document text
    • http://parhelifrl.space/customizable_coupon_template7bwy6.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/ijhgd52/vowoxozafidopita.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/wumadarefikivos.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/ieB4jat/85831911396.pdfIn PDF document text
    • https://cdn.sqhk.co/fotezuvori/SjcijeH/cosmology_vs_astronomy.pdfIn PDF document text
    • http://coins24h.com/road_rash_game_online_playdmb7b.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/Sem24jb/beastboyshub_the_zombie_hunter_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/Ogci2ic/werewolf_cell_phone_wallpaper.pdfIn PDF document text
    • http://fokuguxeni.iblogger.org/27650547764.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/idDjlih/21086701376.pdfIn PDF document text
    • http://udilische.club/851189350016wgbw.pdfIn PDF document text
    • http://triple-doska3.club/zanizafogodijeklffw8.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/pifuxilewaf.pdfIn PDF document text
    • http://zamuxodub.22web.org/xonekuvevidegil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 5760 bytes
SHA-256: e08f8b7ec109fd10746fb48eb65ad199a94b9386da8d5c6dbc6a975732260cfe
font_01_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 10028 bytes
SHA-256: fb50e40e273ddfd33d9e715f8a180d372f0dfe3ba470b8ca769bf768fa1ce682

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