Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10ac6b9a42c352e…

MALICIOUS

PDF

115.0 KB Created: 2021-03-24 10:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c5f5c0692f8a5bfa0cb6e2978b39a001 SHA-1: e5a72726b711ecc1f9c16800a93e84674fc1513a SHA-256: c10ac6b9a42c352e2fa4c3798ea12ec0251e29de5e301eaf1517a49b8c9a192c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm designed to direct users to external, potentially malicious websites. The presence of numerous external links, including one on a disposable hosting domain, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/123?utm_term=graanul+invest+annual+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60281e8ba044e.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/Qjd95FP/guwokuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/jOgiJhc/dj_songs_mixer_app_free_download.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/how_to_start_up_a_weil_mclain_boiler.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_5fe78e55ec58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_601473911af8e.pdfIn PDF document text
    • https://latuguno.weebly.com/uploads/1/3/1/6/131606113/rowufo.pdfIn PDF document text
    • https://kanogerigan.weebly.com/uploads/1/3/4/6/134657300/6132781.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/garimexibizor.pdfIn PDF document text
    • https://zovijopafirol.weebly.com/uploads/1/3/4/6/134630452/7070811a6.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jhxT6dv/dead_trigger_2_pc_game_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_6010c8f7a41c7.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
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_f8382ebe2f6d40a4b20aeb0903214e61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c910eb4-3b72-4ac3-9518-f6c59accc688/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9faac2ed-2587-499c-8ca5-877173129b61/divadoxop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5845e90d-8f9e-45df-b82d-f66183b1071b/rurez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b6ecdd-d279-45ec-be69-5fff21005ee7/c_programming_final_exam_questions_and_answers.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_3a56e110ba984ab28201ecea9c9a5ef7.pdf?index=trueIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_39b382183b094fa98fc730877b2f5798.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_9b73c14d242a4ab58cb7ef7ae9ec0576.pdf?index=trueIn PDF document text
    • http://padegijogul.atwebpages.com/los_adioses_juan_carlos_onetti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae1bef6-a079-4053-8b31-3e5b5b41f5c0/sm-t530_repair_firmware.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16002 6280 bytes
SHA-256: 0d3ce9889cdbe4a5aa5d371a59e9dd4702e0251db4e61396c2e66fe0f90e90e8
font_01_sfnt_off00017589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17589 4784 bytes
SHA-256: 6079d515ceec722d3f631b3893ce5a93eb01e9828de7bb85007d3156c4d73ef7
font_02_sfnt_off000185dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185DD 12436 bytes
SHA-256: 1946d0e523c1e20ba2531fcc0d9f21a7e2d4c768e16dec9e9657883d38a420d7
font_03_sfnt_off0001aed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AED6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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