Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d074547c3c76760…

MALICIOUS

PDF

68.1 KB Created: 2021-09-25 06:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 872cad4a7eb4edbaa194e5e04508ec2e SHA-1: 0235668fc45491004f5772f554b91d8107ec56c8 SHA-256: 2d074547c3c76760b10723bde9e290c799429e95d8133ca3b9598ff1d52f6930
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, with one pointing to a raw IP address, indicating a potential attempt to redirect users to malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further suggests the document is designed to host many links on disposable domains. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cbcom.eu/ressource/site-image/files/57120156094.pdf In PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210907_175434.pdfPDF link annotation
    • http://quiltingacademy.net/fckeditor/userfiles/file/sigixipewazik.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/rubuziruzipelorimotu.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/4080924514.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/59530498749.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410b512eb88---47908159695.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/titevafefoziw.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/69870393546.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/98886861247.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/8596937250.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/wigobodutokatuz.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/pupolufijonevetibodalanep.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614255fde05b1---moxoxiwamomaxob.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/97095676598.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/nujalikuxita.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/64112128925.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/90214808976.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/lolinibalavi.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/kigaburagi.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31255944933.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/zipisufovedizejofufopifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=adb+logcat+specific+appPDF 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_off0000ac71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC71 14812 bytes
SHA-256: c57c4680cb337a9fad2dc250f49716425924aa19567e58339dde445e6c132f75
font_01_sfnt_off0000d13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13F 10712 bytes
SHA-256: 0a57d3889df918bafa8b83464772acd7156124b7a4ca5d06c199fe4beed896f3
font_02_sfnt_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1