Malicious PDF — malware analysis report

Static analysis result for SHA-256 361d60e4c23d936e…

MALICIOUS

PDF

88.4 KB Created: 2021-03-16 21:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b9da21a9dee34e61db8489fde0ad7a5 SHA-1: b1fac9486f95176aff0361b007168c439bfc0a91 SHA-256: 361d60e4c23d936e7504463b65a1dfac546f1a3e2fde8385f38b6b62b0b1cf73
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into believing they need a password for an archive, a common tactic for hiding malicious payloads. The presence of external URIs and link farm characteristics indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/strik?utm_term=grohe+ambi+kitchen+mixer+tap+instructions
    • https://cdn.sqhk.co/tekuligote/0ibjjo1/22817201748.pdf
    • http://skout.tech/50450995600wdnej.pdf
    • http://tpdreport.com/cambridge_latin_course_unit_1_stage_7_practicing_the_language_answersegsjf.pdf
    • https://cdn.sqhk.co/vumojakizaw/hjoo0bF/h_d_engineering_services.pdf
    • http://getyourcredit.info/android_os_9_devicesvn45q.pdf
    • http://gatorama.site/alpha_lipoic_acid_review78snr.pdf
    • http://canlisohbetim.net/xuxevuwegusaop3us.pdf
    • https://cdn.sqhk.co/dudurejavir/liehcgc/xiferurexugu.pdf
    • http://witaseru.iblogger.org/17214068046.pdf
    • https://cdn.sqhk.co/zifeduwa/jfjfij5/wsdot_traffic_cameras_stevens_pass.pdf
    • http://losinglotterynumbers.com/74065912823bkyrg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bafopivazizaxon.rf.gd/78168502814.pdf
    • https://uploads.strikinglycdn.com/files/6d956016-6f66-4d55-8573-8e181cd6e921/dometic_power_awning_motor_recall.pdf
    • https://s3.amazonaws.com/piradi/the_confidence_gap_book.pdf
    • https://uploads.strikinglycdn.com/files/8730160d-4ce7-4136-a4fb-0e71c39821e5/gifura.pdf
    • http://lumapuxasut.epizy.com/beeruva_video_songs_telugump4._mobi.pdf
    • https://uploads.strikinglycdn.com/files/6f87fdd3-5b2e-4a12-8558-6ed012f5f630/lezirij.pdf
    • https://uploads.strikinglycdn.com/files/4e9845e3-83a3-4196-9d15-3f2447044d09/rebopabobuvuwegowojodubut.pdf
    • https://s3.amazonaws.com/sonutopexaramuf/debarment_certification_fda_template.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_off000111fe.bin
077f1508855688470a91cb0e4793ac73074a57d27f69129be955c2876d84483f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 5444 bytes
font_01_sfnt_off00012458.bin
e4c9c054b6c74f0152a550c5e7df047634339598d80ce4981130432b95065ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12458 14412 bytes

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