Malicious PDF — malware analysis report

Static analysis result for SHA-256 47af2f95d4b6c72c…

MALICIOUS

PDF

67.5 KB Created: 2021-09-26 13:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3b4c0de3752d2ac2b39bcdcb1febe8dc SHA-1: 05a842ede88784ff54c34ee483fd9b64aa5e9c0c SHA-256: 47af2f95d4b6c72c7c1ba8f12ca5cf97b7ec9a9ccde14106b6ae513c74b2a88d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Multiple heuristics indicate it's a link farm hosted on compromised CMS uploads, designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a second-stage payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=android+recurring+timer PDF link annotation
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614e84a458f37---tajezijupuxokemowej.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/48879804150.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/wolamajukirenumexabeju.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/18775633441.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/ravigonozedigizojokedeg.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1eba94884---73078526308.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/taxififativufesiso.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/vikizikomodefa.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/11387446418.pdfIn PDF document text
    • http://aurora-c.jp/files/files/78672170158.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/21005401549.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/84890928854.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/70369493181.pdfIn PDF document text
    • http://epmachine.ru/d/files/majezuvujugujaxitepedix.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/66588542024.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/laditu.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/24143950064.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614252ce70862---12156553599.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/kafivudolikagakazu.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/7448374218.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/19695135195.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/xubuvan.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_off0000ac2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2A 14224 bytes
SHA-256: 73999e1b59cacafcbc9b385fcb91b3d22b4fd2850e53556074b367865aa03d7c
font_01_sfnt_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 10420 bytes
SHA-256: 6ce717eb6a639c666347fa9c287c961ca579b0b860af50989ff5f1c8a703576b
font_02_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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