Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29a4fa0d232cd8c…

MALICIOUS

PDF

82.6 KB Created: 2021-09-21 03:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: dc1ee38ceb83aece2ae3967d3b72c94f SHA-1: 8acea219f419bfded7944d03507810ee3f2fddf9 SHA-256: b29a4fa0d232cd8ca0796de05f9b02ac6c1474f31894330c0ca237a8bd792604
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect users to potentially harmful websites. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam context, further supported by the presence of numerous links and the ML classifier's high confidence score. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=how+do+i+remove+my+email+from+another+phone PDF link annotation
    • https://firsatoyun.com/calisma2/files/uploads/rodafaw.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/2303309642.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/42307997844.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/zijumimotegawe.pdfIn PDF document text
    • http://yilip.net/userData/board/file/xibufaliw.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/63744625199.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613137b7007c7---51190276925.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/lunekuxabozarufutixeze.pdfIn PDF document text
    • https://porfic.com/fotos/file/tafuzudezopege.pdfIn PDF document text
    • http://palami.by/images/file/86758428024.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/12243375200.pdfIn PDF document text
    • https://tipresentoio.it/images/file/sujezowuzetukudosov.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/fajomojagawasizit.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/misolulusigaxomim.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/gamejis.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/jowodifeguwumad.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/64586356961.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/punofogapap.pdfIn PDF document text
    • http://warehousetraining.ie/images/86098868766.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/37032232477.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/gufadetubesudesumep.pdfIn PDF document text
    • http://rsst77.ru/upload/files/vapaf.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd56b2d42b---vilarulatominotolovilo.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/64589807794.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/viwiwebapujebokigopu.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091314515636.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_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 10852 bytes
SHA-256: c8a59c5474d6b2021fa9df0fb9757cfecaf5d1a57a05df11de4216e01d68f549
font_01_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 17620 bytes
SHA-256: 8ac71928ace3989f88c9e52791855f57b12543ffe9c4c1692d9a85db93a94684

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