Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcde6adae36b207…

MALICIOUS

PDF

70.0 KB Created: 2021-10-04 00:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a28a9fc4ce0ffdb6db009aef44ee9f16 SHA-1: 6beb83c196180c3db7006e7e32da1f42e30348d2 SHA-256: ddcde6adae36b207442a16299cb5a92f9abfe055aaee009f35e1aa2d6f0b612b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including one pointing to 'garglob.ru', suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the PDF is part of a link farm, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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.
  • 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://garglob.ru/uplcv?utm_term=justice+league+snyder+cut+watch PDF link annotation
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/zezazazuxate.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/80036975469.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/60272950407.pdfIn PDF document text
    • https://hssanesteban.cl/files/58018811618.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/50054619949.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/zebikatudofatit.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/jiuc397uieu6jo62t4vonpaiis/76666533336.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/93943495731.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/95913855339.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/niloditawavoduluge.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/85952569163.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/luwewitesupi.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/fepukagabuwefoz.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631014183.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/rukofirosuvimafad.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/wukekunel.pdfIn PDF document text
    • http://erictex.com/ufiles/files/24214218464.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/gowuputa.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/76655093476.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/bezololabidanorozavobuva.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/76006119602.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/18047774598.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_off0000adcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E1 17064 bytes
SHA-256: bb45472760b6b63e6aaa7881fc51dd2fd65fbc83844010f37d49ae4222d86d2f
font_02_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 10820 bytes
SHA-256: f0680360c99ba3d190d2982558a3a6c5f1c9b5a159e27f7e49032a28f3c60189

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