Malicious PDF — malware analysis report

Static analysis result for SHA-256 92465c328f623ee5…

MALICIOUS

PDF

75.8 KB Created: 2021-06-01 17:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f432d710eaeaf0c6f96ff69d5157fb2 SHA-1: 78e9b8cea5f5bd75b2e071badef315cc19319cf6 SHA-256: 92465c328f623ee5fbf5a7347e8454f87dc4c499bd6befa3c7392996d04999b0
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or redirect users to malicious sites. The embedded URL 'https://crewmak.ru/pbw?utm_term=are+h7+led+bulbs+legal' is a primary indicator of this activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/pbw?utm_term=are+h7+led+bulbs+legal
    • https://static.s123-cdn-static.com/uploads/4459027/normal_5ff0eb4237897.pdf
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5feb355dc190a.pdf
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/55fc6c.pdf
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/mepasowipikiro-buxamenuref-mafepa.pdf
    • https://cdn-cms.f-static.net/uploads/4446045/normal_604ca4fbc2f50.pdf
    • https://cdn-cms.f-static.net/uploads/4411916/normal_603f63a26e1f6.pdf
    • https://wuxepufoz.weebly.com/uploads/1/3/4/3/134371519/nabozavuju.pdf
    • https://cdn-cms.f-static.net/uploads/4494149/normal_60279032b7535.pdf
    • https://cdn-cms.f-static.net/uploads/4477916/normal_6067140f977cf.pdf
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/poraranesi_xukotutelaz_sobilux_besilagukizeb.pdf
    • https://zinikatutonew.weebly.com/uploads/1/3/4/5/134504697/vagerekeleforaj_memifodewog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07cd85d5-6c7e-43b5-b650-b4ffb200658d/what_jobs_can_you_get_with_a_public_safety_administration_degree.pdf
    • https://uploads.strikinglycdn.com/files/e0b34933-34d0-40ea-9f4d-ddd7b1ca65b0/the_vampire_diaries_season_8_episode_12_bg_audio.pdf
    • https://uploads.strikinglycdn.com/files/c8486174-229c-4abd-b2f3-e1f817984d2b/lg_lp1213gxr_disassembly.pdf
    • https://uploads.strikinglycdn.com/files/283ff8e3-aca6-47ce-a9a1-e242d66e813e/mufamaterovezofara.pdf
    • https://uploads.strikinglycdn.com/files/ac511d53-d0ee-4a49-9904-7f82a1347663/kadanazosifatisufen.pdf
    • https://uploads.strikinglycdn.com/files/982342af-99d9-4601-9c77-16bc8d78dbe6/57457739653.pdf
    • http://dekokos.pbworks.com/w/file/fetch/144418773/83143598251.pdf
    • https://uploads.strikinglycdn.com/files/df7555db-35f4-4971-a6b4-e91cf13f9ff1/jabomirexib.pdf
    • http://bupataved.pbworks.com/f/how_much_does_a_minky_couture_blanket_cost.pdf
    • https://uploads.strikinglycdn.com/files/6ae6b254-f3d5-4f83-8cd5-c80d5dafb73c/ryobi_table_saw_stand_instructions.pdf
    • http://kolelulu.pbworks.com/w/file/fetch/144417120/led_tv_service_manual_free_download.pdf
    • https://uploads.strikinglycdn.com/files/91c03b08-43ef-4875-b2bf-a97ea8a9b1a3/65225902718.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccb.bin
33124bf712baea015ab9f424c35b8dcda2cd02ebfb3448348ae7bb99fdc5a4e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 5296 bytes
font_01_sfnt_off0000fec7.bin
07443e4c0d7d31d8cbf566bce27f0ab0ca2b42cd7f01230351ced18f0261496e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 10292 bytes

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