Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f221e62c30d27f…

MALICIOUS

PDF

75.1 KB Created: 2021-05-30 07:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 613b9d31ff3aff96c5e5802471de5b68 SHA-1: 96b2fe3bd42df3f555677fdef532e570623a76e1 SHA-256: 02f221e62c30d27f05bbe06115e279247805cc6c05694aefa1d829ef2fcb585c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDFs, suggesting a link farm for SEO manipulation or phishing. The primary URL, https://golowaki.ru/strik, is likely part of this scheme to direct users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://golowaki.ru/strik?utm_term=ludo+star+cheat+codes+for+iphone PDF link annotation
    • https://noribiri.weebly.com/uploads/1/3/5/3/135347041/roluzapipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_604549ec2ed6e.pdfIn PDF document text
    • https://talaxekagaros.weebly.com/uploads/1/3/5/3/135347480/jajowiwelufisitamefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_60139a9aa518b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_604f5dc060b1e.pdfIn PDF document text
    • https://jomopejizudo.weebly.com/uploads/1/3/4/6/134664487/511b9ad960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6020056d3186d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_5fc8a51c5775a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_601b538c098ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afba351-3087-497f-998e-1cc6328adcea/golanesipefukapopulex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd4a97d-5b9e-4b5b-a034-da6c1577ee04/18128115059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a357169-96b1-4e69-a1fd-e47394c0781c/cambridge_latin_course_book_1_stage_10_controversia_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514b4a0a-7a12-4b39-af86-87a1efb7d962/now_is_the_month_of_maying_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f4aedc7-7243-4897-a378-1133cde84cb8/magefakesafarabubaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28aff7cb-1851-40f0-b174-d13b7ccc8359/which_liquid_detergent_is_best_for_front_load_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8844ed49-f432-4e1a-908c-6990f19cb5e3/15537691431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5f990c-3bbc-4bc1-b91f-fe0a2c2c36fd/emergency_care_and_transportation_of_the_sick_and_injured_13th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cb2f4d-2f54-45d5-92f8-4a175c2b66ee/93716610616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c9b5a24-8e2a-4a91-b6d0-e977cd41267c/girl_scout_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f7a85a-ab39-46ca-8fc9-75a6670b3d86/how_much_is_adobe_premiere_monthly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e0478f-f8a5-4884-955d-9151323f0aba/magic_mouse_review_2019.pdfIn 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_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 5152 bytes
SHA-256: 71367c571508e8127bfbb42de9cb336dce03f8fd993d95bda33893ffba0849bc
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 10664 bytes
SHA-256: b54036dc07610a7e90342994ebda7394b7034c7782b23bfe4b3835a8c1ec5c94