Malicious PDF — malware analysis report

Static analysis result for SHA-256 532ede7625304a79…

MALICIOUS

PDF

68.7 KB Created: 2021-03-06 09:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d1f715ad573c0660d262abc798529246 SHA-1: a0e81af1ea58795e0d60bf6d7e548b883e9f2a6a SHA-256: 532ede7625304a79113b111a2294c423990fc9abb026617a333d5291283d241b
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm, with multiple external links, including one to 'botokaw.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack.

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/wix?keyword=insite+by+sodexo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fdaf9ba40e8b.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/16857005710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_601bcaef59f77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jifesu/wheel_of_time_audiobook.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_64af92aab41c4b2896301f8862700b45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e2613d-4519-422e-9b6d-9c130cd6469a/widaretonofukizunaxu.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_532bc8c8a6d34cada33860bc52b05ab0.pdf?index=trueIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_d025f02150ad4c5fb18711307007294e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5fb436-bbf4-49bd-898a-0bc77042936f/call_of_cthulhu_7th_edition_character_sheet_editable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f908644-13cf-4715-a739-be4e2cf37ff9/69734239940.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/business_analytics_program_wharton.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_936ac563c840435eb14b59e40e4021b7.pdf?index=trueIn PDF document text
    • http://xekabotiwuker.atwebpages.com/the_one_thing_you_need_to_know_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba75c57-40e5-4eb6-b5e1-6ee88ceee673/how_to_get_in_my_icloud_account.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_9b84928e87d645ba897b1707e12ec60a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c298543-c8c9-4ab1-9a32-e5522facf960/cost_to_change_address_on_mn_drivers_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6e80e7-246a-426d-93a6-ca767d648352/monewuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/mumivufubirozamokate.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_off0000d215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD215 4728 bytes
SHA-256: af34f2c20577313dc5c1badb88e50f3dd5dfc6080f7ea3231f4cabf0b53f873e
font_01_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 10380 bytes
SHA-256: 0a367baa7675f69c493c5b3e2a850a0c948584660772d1bac44adfc6bd35fb0a