Malicious PDF — malware analysis report

Static analysis result for SHA-256 296f051a1b41e492…

MALICIOUS

PDF

97.3 KB Created: 2021-06-01 06:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c9a745dea440520dd3e02765c3d2e5e7 SHA-1: 4961b926075cdbc5d6dcdeefe9f6bee426fa8bf1 SHA-256: 296f051a1b41e49242f67a7c9a06ea917705e716d068d9189ea5cbff2f29f4bd
226 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files on disposable hosting services, indicating a link farm or SEO spam tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'SE_LOLBIN_RUN_COMMAND' suggest potential for executing commands or redirecting to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://bologen.ru/wb?keyword=i%20never%20sang%20for%20my%20father%20monologue PDF link annotation
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/4829151.pdfIn PDF document text
    • https://numazerezawikar.weebly.com/uploads/1/3/4/6/134618887/b91f44826f0.pdfIn PDF document text
    • https://wigubidukes.weebly.com/uploads/1/3/1/6/131606651/warolegewadivupozo.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://kekirow.pbworks.com/f/jubotuv.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/gattaca_movie_questions_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2197221-a5bf-4eb5-97e1-b3c0cb888d54/dc_unlocker_with_crack_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720350b7-2a1d-402a-b704-718831c237f7/zufinekixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab2c5dc-0326-470f-90a7-2d5e945602dc/stihl_hs45_user_guide.pdfIn PDF document text
    • http://wusagem.pbworks.com/f/kapev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdaca7f-2a2c-471e-9fb4-68b236179c9c/how_to_properly_use_a_clamp_curling_iron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54349f1-014c-4c54-9591-652069407748/how_to_pair_a_bluetooth_selfie_stick.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/para_que_sirve_el_te_de_manzanilla_con_limon.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/2ffd353a-eed1-43fa-b80d-d4033892590e/82058337106.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/mivugejipapudodoxuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d98f91-982a-4e1e-b071-53e7afe566bc/cubase_le_ai_elements_8_crack_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0901de0-b562-46af-b591-b70df996a1f2/common_smells_of_esters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa0f5bb-7103-403f-95fc-0e5f1efaadea/your_wish_is_your_command_kevin_trudeau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9e2247-1410-4064-9619-80dba2128d7b/32721676004.pdfIn PDF document text
    • http://sewafebi.pbworks.com/w/file/fetch/144424086/33844305011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0926b11-601c-4b78-8cfb-b44e32aa4c04/pifobaxofakiwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05767fac-4e6e-4421-bad5-e19661c4e9f2/what_are_good_chest_workouts_at_home.pdfIn PDF document text
    • http://garigor.pbworks.com/f/laboratory_equipment_and_uses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de5b393-80bb-4667-94ab-b3d69c96a189/55129135099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c09aefb-4a97-4597-b5dd-4c470b8acb56/dd_5e_forgotten_realms_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde4fdd1-f3bb-422a-8fc8-f38a62e6178d/masusakikanesezo.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
    • https://uploads.strikinglycdn.com/files/a54In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 5116 bytes
SHA-256: 282df52776aff872bc944fcf912e8cbceb5d3db21babac6156ef39285438e683
font_01_sfnt_off0001439d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 11184 bytes
SHA-256: 7208255b78a770fe3bbe82ca6dd2ca7c1b019eaf49d7b2c1d233fe2ef6d154a0
font_02_sfnt_off00016953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16953 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361