Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e57f222e380477b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-22 14:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 83dd9d9a77e9b4e0e2fd21af5b21d1bf SHA-1: e1e29df2c786df5260060a12046af57a123c6091 SHA-256: 3e57f222e380477b94242ed4c6918ad0ca15fb0cde034f70378bbda24c68198d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. The 'SE_CALLBACK_LURE' heuristic indicates the document likely presents a scenario requiring the user to call a phone number, consistent with phishing or tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites or initiate fraudulent communication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://perchegouet.com/ckfinder/userfiles/files/93210848.pdf In PDF document text
    • http://aloisiquadri.it/userfiles/files/medolibopagutudiv.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/90603197340.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/96176359917.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/90272054363.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/pijekozolunotigalagogip.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/29128423681.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/nobap.pdfIn PDF document text
    • http://alvitraders.com/files/mapixibitosilebopap.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/rexedizireb.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/27862352108.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/rbq8qbq30ucu9hovp2bui3rpjg/logededopisiremiwuga.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/daniwotofagiz.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/071e2b9ed4913dc16424f6187a6d7cc4/zonipijixanemas.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/3398806140.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/diwikepusab.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/23175838860.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfadccea61---kogedepozupijanegati.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/48128993595.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/gubabeniduxolotevugisi.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/pemujo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e2d239699---tonixuxu.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109132342316739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=autocad+2019+serial+number+and+product+key+freePDF 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_off0000d4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C7 17036 bytes
SHA-256: a4bbdc6295737c56597558e960c3a41b7d9fd7d63f2ee00121ff784e16a34dd0
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C9 11668 bytes
SHA-256: 2ffef1350835a3c589ce403f33bc4a28bb44f1355ad98d5b5afce0bb17baaf13

Open this report in the interactive analyzer, or submit your own file for analysis.