Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc1e884804d1fe2…

MALICIOUS

PDF

74.0 KB Created: 2021-09-13 03:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a15041409b4e6f21ef344db0105bad84 SHA-1: 1d6ff179e450fd9be3934ec7856f17bd111947ad SHA-256: 6fc1e884804d1fe25a9e1ca6e49bd1a9935e7c6bda16660cb5a673f243118af9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains exploit code or phishing content. Numerous embedded URLs, including one pointing to an IP address, suggest an attempt to redirect the user to malicious sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=pdf+4+pages+in+1
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/kuxodumuxawibujufasurefo.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161353ff482c0e---55801564021.pdf
    • https://shevian.com/images/file/2925353260.pdf
    • https://malashealthcare.com/userfiles/files/kufiwowobepes.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/gue3rfe91gnrr6le0r20r1rfre/81917438414.pdf
    • https://aspirecambodia-edu.org/userfiles/file/rexagusut.pdf
    • http://byty-pardubice.eu/UserFiles/File/82718086861.pdf
    • http://instant-image.net/UserFiles/Site/File/15928988269.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/69961388823.pdf
    • http://rainhouse.kr/data/editor/file/14713756176136cfb811d66.pdf
    • http://www.dawnrotaryclub.tw/UserFiles/files/72418739575.pdf
    • https://mr-alian.com/upload/ckfinder/files/89406002322.pdf
    • http://spielundlicht.de/content_provider/documents/files/4508389420.pdf
    • http://mazraeir.com/images/upload/files/56184272066.pdf
    • https://mehfermobilsaglik.com/userfiles/file/81293779104.pdf
    • http://cka-shiba.com/ckfinder/userfiles/files/98089869882.pdf
    • http://musthighschool.mn/ckfinder/userfiles/files/6950476753.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613e915530dc7---28106350049.pdf
    • http://seyrimerdin.com/userfiles/file/40394308827.pdf
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/madutojozogosa.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4ae94a74c---sajewukazetelekogad.pdf
    • https://basisangka.com/contents/files/37537002717.pdf
    • https://opsclown.it/ckfinder/userfiles/files/dewudawudub.pdf
    • http://hungthanhauto.com/luutru/files/758599940.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c015.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC015 16792 bytes
font_01_sfnt_off0000d82c.bin
91bce9226d94cdb1bab0641fa6ddf603e7ced9fa0a73f75ee8e52f5e3f452ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD82C 10440 bytes
font_02_sfnt_off0000efce.bin
0f28f8f4015eacbd7035ff051240616783107a24b1aa98ed2664664377066379		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 16524 bytes

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