Malicious PDF — malware analysis report

Static analysis result for SHA-256 9986fa9d512f0be5…

MALICIOUS

PDF

73.1 KB Created: 2021-06-05 23:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5ca885e7ea1f72d502928a9c86d9ce14 SHA-1: d16abf452591d0cf9fd81f8f9a07ce45002d225b SHA-256: 9986fa9d512f0be5c8d8d4d72e0bb7c7ecdc8faabf81e29358db9bbda1e37a61
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, with a high concentration on disposable hosting. The primary URL, 'https://pistant.ru/pbw?utm_term=free+fire+hack+unlimited+diamonds+apk+mod', suggests a lure related to game hacks. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pistant.ru/pbw?utm_term=free+fire+hack+unlimited+diamonds+apk+mod PDF link annotation
    • https://fimiximokizo.weebly.com/uploads/1/3/1/3/131384127/bewal.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/9ecb8.pdfIn PDF document text
    • https://ripafikumitepi.weebly.com/uploads/1/3/4/6/134622323/xuvopox.pdfIn PDF document text
    • https://mojijunu.weebly.com/uploads/1/3/1/0/131070220/beteku.pdfIn PDF document text
    • https://winofugunolef.weebly.com/uploads/1/3/4/8/134846497/9154698.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/kijenezupirafer-gudezani.pdfIn PDF document text
    • https://dexejajakoto.weebly.com/uploads/1/3/0/7/130739268/8a4c0530838a753.pdfIn PDF document text
    • https://ruwofemenir.weebly.com/uploads/1/3/4/0/134040866/fusufexeboxa.pdfIn PDF document text
    • https://duwizule.weebly.com/uploads/1/3/4/6/134663296/4518344.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/72fc1.pdfIn PDF document text
    • https://wugavebanolija.weebly.com/uploads/1/3/7/5/137500500/316e14f495ae.pdfIn PDF document text
    • https://xuzatikanuji.weebly.com/uploads/1/3/0/7/130775198/6272194.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/50d2d151-6c0c-4fb9-b556-5c67528259f5/fimutabuf.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144576303/gibexobubi.pdfIn PDF document text
    • http://tosuvop.pbworks.com/w/file/fetch/144475614/what_is_the_job_of_a_geotechnical_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51483b90-9d2b-4bf7-8a4e-98af84fcb725/92679272195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe8aca8-7860-4c6c-bf63-65d53414c447/29391528241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14387c22-99c7-4adf-bca0-19e56ca7fd9d/61785764968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c82a7f9-e483-4eef-929f-016308a99a59/how_to_adjust_husqvarna_zero_turn_steering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f224d47-635f-4063-9955-19dd89131e85/decision_tree_function_in_r.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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 5412 bytes
SHA-256: 79d86c0510518032026c83c1b9223773223b7db6199ba11036f4f8dea5f9400f
font_01_sfnt_off0000efd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD9 11564 bytes
SHA-256: 1129bc42624ace3bb626b8b3d31d00ecc6ff73769411e5477324a086bd90fa0c

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