Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db89544ca1c0a1e…

MALICIOUS

PDF

85.6 KB Created: 2021-05-13 16:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b976063f29ef2c918a35b78e3b98edd0 SHA-1: 1ceb92b18f0b923fad8ee7debbe244b7edb41913 SHA-256: 8db89544ca1c0a1e98c0ba849ffa6d628a00deb9b0c3bd4821609b37dca76da4
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 0.9994

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://pelibifir.ru/strik?utm_term=where+to+watch+night+shift+movie PDF link annotation
    • https://cdn.sqhk.co/pivoledofag/Zhbhhgg/adobe_flash_player_activex_filehippo.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/dVicy4g/63329227849.pdfIn PDF document text
    • http://dkmz2.club/61733212435sv9kd.pdfIn PDF document text
    • https://vunolevakedo.weebly.com/uploads/1/3/4/3/134317922/3db3a.pdfIn PDF document text
    • http://wisitens.online/87815873345e80q7.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/cihhche/penifaverewijodurapavadod.pdfIn PDF document text
    • http://fiduwil.iblogger.org/pasopisi.pdfIn PDF document text
    • http://rarojuso.22web.org/36024884726.pdfIn PDF document text
    • http://teachersaid.fun/79641144604uwu6m.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/acibiji/smash_bros_gamecube_rom_download.pdfIn PDF document text
    • http://detonic-hypertonie.website/equifax_unfreeze_my_credit_reportfqzza.pdfIn PDF document text
    • http://euromarket.pro/hitman_sniper_challenge_high_score9k36l.pdfIn PDF document text
    • http://papakofowomida.22web.org/direito_ambiental_econmico_cristiane_derani.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/rivalukivibuxozoniba.pdfIn PDF document text
    • http://kubojep.iblogger.org/new_look_white_slogan_t_shirts.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/hbiEq2R/shadow_demon_slayer_apk.pdfIn PDF document text
    • http://biotringel.shop/oxford_rhyming_dictionary_online7jprs.pdfIn PDF document text
    • http://lnstagramsecurity.net/phone_dialer_codes_androidldswe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_364b2b58fa8e4a71beae09857a15f999.pdf?index=trueIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_3f1d4d0d5b494679b2a8bb5c16a97cde.pdf?index=trueIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_7807a8c8b6e2441f8510f8163ea0cdfa.pdf?index=trueIn PDF document text
    • http://sidufeloba.rf.gd/vba_vlookup_function_another_sheet.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_ca389906fb29489a9fb4c0a86b8eddae.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_off0001110a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110A 5428 bytes
SHA-256: 4cb92fe9963d44674458d697d20c081a1ff6e607b530893fc5b278c38d2e3029
font_01_sfnt_off0001237a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237A 11208 bytes
SHA-256: 8ed954b3663c093fd3b99f8831a32ca80a9def2400c65cb663f56736d66e117e

Open this report in the interactive analyzer, or submit your own file for analysis.