Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dfea183d9f25ff…

MALICIOUS

PDF

69.1 KB Created: 2021-10-01 07:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e001261ddb010c01dce075ab39dd1488 SHA-1: a37add31cc88e81cce98c8b667aa6fabdceed79b SHA-256: 47dfea183d9f25fffde119ecb3c456ecc6df9ab160012cf11ef4366afdf5a390
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links to external domains, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm on disposable hosting. The document body is heavily obfuscated, suggesting an attempt to hide its true nature, and the presence of embedded URLs points towards a redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 69 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 http://firegallery.ru/img/upload/59764341887.pdf In PDF document text
    • http://naturpix.ch/cmsimages/file/ladunapimawuwuxonuka.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/mujibeja.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/21361931360.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/88549812288.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/45111425079.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/45249000806.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/80684470865.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/divalemawaxopepafozuk.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/24174981696.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/92090852667.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/rogosi.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16150d764c0cda---nowaxikijikadidupu.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/84667895442.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372c0014ada---81599722594.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/58026325807.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a0aad18c4a17cbfad03a363b1f3a42b6/kawalitixatanovexobeli.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7264cbf11ef541aefb9ec092d1568d2b/xigizikimiliwuludomogokin.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/wakuzajudepuwumenifuwa.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/lolom.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/15941195384.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/sedopogu.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/pamigamovanawilepamunide.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a9deef7f9ac90bf257525ec13aca8d93/58290525800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=moving+wallpapers+for+windows+7+hd+free+downloadPDF 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_off0000afe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE9 10872 bytes
SHA-256: 505d99a0210270be54c26a59795f71669545eb36ba0263d26ed25cfacd42fb14
font_01_sfnt_off0000c8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 14372 bytes
SHA-256: 348bad55e24802e145bbb82deb35a45355760f98ed6fff223ea9b74f84a790b0