Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d64689b671becc5…

MALICIOUS

PDF

84.7 KB Created: 2021-09-18 21:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae2a7f2b1c9f36584a51b33a4dc952c9 SHA-1: ba97698017f5d96bbe8894cfe20d080fce91b0b1 SHA-256: 3d64689b671becc530d3ba0e3849bf314d6228fb8ec926811fbe04c3d990634b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs and is structured as a link farm, suggesting it's designed to redirect users to malicious download sites. The presence of a 'download button' heuristic further supports the lure of downloading a file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=naruto+senki+overcrazy+download PDF link annotation
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/lemit.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/jederefisi.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/kubodadobubux.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210917040342_1774939865.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/numapew.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/tijezaluzufijulopodet.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/lolamusawekuvenomod.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/nekafobedifodavip.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613274981498d---10848524412.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/17188895769.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/pezatulogomuwik.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/mesukufofitoponenizesatig.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/vapamadivetixakadovoj.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/mesexigufor.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/84559910328.pdfIn PDF document text
    • http://opsir.eu/files/file/wiponopurogizejixaz.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/ramejulozo.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613524ca01418---73102176922.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/21760553348.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/32571060203.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/38748753995.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/bukumexafegajememe.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/vemovazemakunibebalasuj.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/fival.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/50994709744.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://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_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 18324 bytes
SHA-256: d321a8c28c8a96b0e9bd98edf224875c5ecdd0bc84a9a3b2afd2c3b8d9226bb4
font_01_sfnt_off0001137a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 10860 bytes
SHA-256: d1b3402cab3484b2ad8ea727e7fc5f29abb1b60f8951db04d8e08ae8f1fa4bc3
font_02_sfnt_off00012cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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