Malicious PDF — malware analysis report

Static analysis result for SHA-256 93adb892c73495a0…

MALICIOUS

PDF

80.3 KB Created: 2021-04-03 22:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac9979a05ea2e4795e1dc17c89ce9fff SHA-1: 4ea3dec1ac22d807c9c8ec39ddd65f7b6b7185eb SHA-256: 93adb892c73495a0c1b008f8b9b6dfaba403afa242108df80bb473b0650e4241
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various web services and personal domains, indicating a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=websites+to++ppsspp+emulator+games
    • http://jikusofare.mywebcommunity.org/bluford_books.pdf
    • https://kusovagojevo.weebly.com/uploads/1/3/4/8/134883394/7322583.pdf
    • http://fumumowovufa.mywebcommunity.org/beckman_oral_motor_exercises.pdf
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/6688300.pdf
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/5a04a30.pdf
    • https://xupugafowepeg.weebly.com/uploads/1/3/0/8/130814457/ebafbc0.pdf
    • https://kamowomol.weebly.com/uploads/1/3/4/3/134371521/26789ff7685c.pdf
    • https://fajalosi.weebly.com/uploads/1/3/4/9/134901252/jokelojemuwilowo.pdf
    • https://votixired.weebly.com/uploads/1/3/4/6/134633812/64c262f4aae726.pdf
    • http://vugekowuzujed.scienceontheweb.net/vamokuzoko.pdf
    • http://jajolamuseku.medianewsonline.com/arbeitsblatt_bruchrechnung_klasse_6.pdf
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/zufawelisezebiw.pdf
    • https://butadopol.weebly.com/uploads/1/3/1/3/131378795/biwebax-fiwamimirisakap-dopiwavavu-zofodeguzuwisol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_ed687574e3f449a49eecf9e35e6584c2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/43c00271-72d5-40fb-b1af-0466ed123e7f/opentx_companion_2.2.1_download.pdf
    • https://uploads.strikinglycdn.com/files/d6b18522-21f9-4681-b3ec-bd7de288c296/how_to_perform_slam_poetry.pdf
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_e08490ca5781404b940198eec803dfbf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3c244f30-72cc-4aac-b5bb-2782d70b88c6/how_to_release_medical_records.pdf
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_898c8628b33a489781b44fa2bffa9a2f.pdf?index=true
    • http://fogokenum.onlinewebshop.net/windsor_castle_history.pdf
    • http://sutexuvidag.myartsonline.com/john_deere_48_mower_deck_parts.pdf
    • http://vumamuv.myartsonline.com/2013_ford_f350_service_truck.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_off0000fbdd.bin
290ef10d56e8a63d5ccf177b74c8c6b34b5fe95dd75cb31580cd11c82fdb1ffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 5292 bytes
font_01_sfnt_off00010dcf.bin
cbf22dea82e3291e0bf4a6a1808500c1cf9ee5278c82b98d0f0fa48c048033f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 11220 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.