Malicious PDF — malware analysis report

Static analysis result for SHA-256 460b54b8c1f63964…

MALICIOUS

PDF

82.1 KB Created: 2021-03-12 22:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 530566152fcf517d707a68fc3d46990f SHA-1: 12ed7b8b90af29f3caae3d1c0084e6cac74c65d5 SHA-256: 460b54b8c1f639644ff544a0e30035e984a1a49ffe2a100cdd94181e0e97cf93
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 0.9990

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://nipisod.ru/123?utm_term=brian+head+ski+resort+snow+report PDF link annotation
    • https://cdn.sqhk.co/kizewetete/Q62iahd/rirolasukuro.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/bxjhimc/play_word_garden_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/LhiRjje/78896396122.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/jf9w2V2/wallpaper_for_gamers_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jiWii8P/raymond_animal_crossing_minecraft_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/iUXNl3X/25951486200.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/hiidhdf/22033300930.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/54315961777.pdfIn PDF document text
    • http://wiinorama.website/30619303404kthpr.pdfIn PDF document text
    • https://cdn.sqhk.co/dudavizi/jgijfnI/27594969428.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/Jphege0/asphalt_nitro_for_pc_without_bluestacks.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/is_cyberpunk_2077_on_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/hfxn7MZ/buddy_throw_mod_apk_rexdl.pdfIn PDF document text
    • http://saudiautoinsurance.com/21382817926bozo5.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/heeWa7G/74585782521.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/jgijgpZ/zombie_war_and_shooting_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/iPhehj5/40366758595.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/dewalt_miter_saw_stand_heavy_duty_with_miter_saw_mounting_bracketshv5m8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://japinoxizidunub.myartsonline.com/mabujusimewimazizasi.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_42ee9693a5c14a9489d5d1f846e9fcd0.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_ae787c6bdf7946d5914ab592eda4e728.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_2179693fc4df4f21a10a891b6714e7bf.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_48dc5a26b860495184fbb106ac1a8aa6.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_c60bbe2e6d8c4ad8b0b4492470b1efa7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 5008 bytes
SHA-256: 792d3f8fc377039f8dfe8f70b6fb37a94382c16c443f8e24ae240f632d238bf0
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 13300 bytes
SHA-256: 60a80565c19204ed7a5fcea99b7b9fc4fbac087d830ff31ee54ee0181a6a0751
font_02_sfnt_off00012cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361