Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b46f8664bc3e40…

MALICIOUS

PDF

79.7 KB Created: 2021-09-09 23:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 7aa34608f26a691991a33974c2fca947 SHA-1: 38aa57f6c64e7f6cf84ceb9ae8811d94e8d8cfea SHA-256: 94b46f8664bc3e4068571d3fc4920112b8f2b31aeb01962e9591d19d8c2a01d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, which are characteristic of phishing and malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to redirect users to various potentially malicious download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://3wsystems.com/shipinc/userfiles/files/20283939013.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131755892fd9---93728949599.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/90390958193.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/tuwopevisage.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/pevevurezexuvasodigizok.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/xelex.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/63932023527.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/dovigovurimuruvo.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/29493672006.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/vuvoriwejilipitex.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/41884006687.pdfIn PDF document text
    • https://akemi.ro/hirek/file/fafalapevoleleluzumog.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a8333d550---89605498219.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/dedezipugulo.pdfIn PDF document text
    • https://priscar.com/documents/files/88226495296.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/dinafatizufawebi.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/78659791956.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/86542329460.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/28210159868.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/soxan.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/xudepubuvuzibibome.pdfIn PDF document text
    • http://letdentalab.com/img/files/49351458499.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/jixilakidepinusaxodinup.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/42333897322.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/93325655470.pdfPDF link annotation
    • http://grandfiltr.com/files/file/18720880582.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=android+os+for+windows+10+64+bitPDF 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_off0000d34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 17152 bytes
SHA-256: b3de4f115588216916776e966bb947b66b4fe02d39ac4d69be58d4a4cb444386
font_01_sfnt_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F9 10632 bytes
SHA-256: 1e9e2ec743a5d14656c1fa29112141641482ab653178450ef0cb451ddcbd5030

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