Malicious PDF — malware analysis report

Static analysis result for SHA-256 8571f1c62331e71b…

MALICIOUS

PDF

83.1 KB Created: 2021-04-24 13:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 06bc73ced0c818c7dda60343a5649a48 SHA-1: bb42e41040089540dbaec18b5a6d49b85d61fc4f SHA-256: 8571f1c62331e71bd0cf75d8c9a0ff4672ab04981b88d7dccb70c2f2c3dedf36
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The embedded URL 'https://botokaw.ru/strik?utm_term=what+is+the+promo+code+for+gamestop' indicates a potential phishing lure related to promotional codes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=what+is+the+promo+code+for+gamestop PDF link annotation
    • https://cdn.sqhk.co/jopubelo/jfKhe3o/warriors_news_draft.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/ihijnNj/tank_battle_heroes_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/yH2gjih/88316692800.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/jbijgCG/4187646830.pdfIn PDF document text
    • http://salonop.xyz/44405319566jufit.pdfIn PDF document text
    • http://nubolats.xyz/pedunu5obrx.pdfIn PDF document text
    • https://cdn.sqhk.co/lizubenesowi/jv7XjgB/80231298551.pdfIn PDF document text
    • http://gtomishebs.xyz/why_is_the_lovely_bones_rated_pg-13l9kti.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/Ig7Hejj/gokirogojuxudula.pdfIn PDF document text
    • http://mishgen.com/livro_gastronomia_funcional35ggy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_a8e3f66121f94cfc8a7efdd7cc572c12.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_2a3b9a8791c744e6bede74e3ab028138.pdf?index=trueIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_2fde436b4f60421caadfc5a4a729289a.pdf?index=trueIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_4bc54ae7ab2e439aa5014c670458c052.pdf?index=trueIn PDF document text
    • https://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_26530ea6d1af4a97adb6f1428d5bc260.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/166f57ed-48e5-4a21-8eef-6add3f09bf34/late_stages_of_arthritis_in_dogs.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_4e85cacf43294a88ab256b474284f84a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd77f30d-9369-4ee9-b6e1-981a6c208983/14613424500.pdfIn PDF document text
    • https://a513df27-8ea1-49e5-9b48-af726a3c99b5.filesusr.com/ugd/c567c1_9317f88ac0234817988740dee32f587b.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_off00010536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10536 5552 bytes
SHA-256: 0faa032709f628ced7a8b2ad274d645ee514d14bb7c92718ec7ec3c9474198f9
font_01_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 11600 bytes
SHA-256: 8c26b07def3cad5ff3ea11791ce174dce52c005597f46f29f3591519f61644ef