Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a4b572dde21793…

MALICIOUS

PDF

80.9 KB Created: 2021-09-19 07:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2d2a8539638ac793ddd9e997abf1c082 SHA-1: 073357bd5e2550bb050ef64c82964bb5436e7e7e SHA-256: e0a4b572dde217938e34bcf393794555e98a6799ca411d6b75968c910a4a62f1
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains multiple links to potentially compromised websites and exhibits characteristics of a password-protected archive lure, suggesting it's designed to trick users into downloading a payload. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/oanddtqsceog8hqou57u1gur1j/pifum.pdf In PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130da9dc5dae---61522002384.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/defiv.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/tujilajetalupowenomodoten.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/60571060716.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/xemilefewafona.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/6f767c84f048414018ef67f53906942c/fejubowamokugolimenubaja.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/getumogabugubozo.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/94869628321.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/eb984939d7d09bb371d51eb97ed0d9c6/38765393310.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/danexukerikefusovozex.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/tarazega.pdfIn PDF document text
    • http://gemmacapitalgroup.com/foto/file/kejirurijijiniri.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/13474117553.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/98086324693.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/cqsiuq8cn8vqe3f6d1pb59fh13/muriromixul.pdfIn PDF document text
    • https://mavibusiness.it/file/60658523942.pdfIn PDF document text
    • https://peperita.it/writable/public/userfiles/file/fosofim.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/jepumuwawafexesak.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/74098720037.pdfIn PDF document text
    • https://cet.sk/res/file/27119490569.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/fa0890a61e8c9f87f4c489994084d4d3/73156767143.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/betub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=json+to+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 9960 bytes
SHA-256: d2ee5a955a83c4818daa2c19c1a166065effb1bb9d0c78f1cc7f07cdf1436399
font_01_sfnt_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEC 21264 bytes
SHA-256: 61b85bdef6ab5f5d766585acaa690499335b5fd4405884a70028d2006d64bbcd

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