Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c46001da455beb8…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 00:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ba95606f11e5b3f4ddce23de37116821 SHA-1: 578c3ccefd1bd103b50f7eeaa1bc3a8ebcef0c56 SHA-256: 0c46001da455beb8832d80b7956e65d0a242f0341656b52be4346bd42b68b877
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and the nature of the embedded links align with common tactics for distributing malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://abwlanham.com/uploads/files/fujero.pdf In PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/37960583508.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/51014798659.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/34471a1b31ebf5b7cb880a19f15caac6/55943870085.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/61229141338.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/23354267398.pdfIn PDF document text
    • http://qdjshg.com/files/file/dupewabesubojisusipeb.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/65ac9b5e78845cf389cf49021c2e6006/dunojaxokovulede.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/dovowozerunojanuveduwe.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/filuxixerireduzuku.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/mijesosorufukatul.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/99255189265.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b534908a15109525b2607cd32364f596/daxurubijezusu.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/12670857473.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/71249321226.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f13035848---lemitibizex.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7096f38d---pojabevuzulam.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/17858923964.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/zetewulegumepupitipexufov.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/28362312280.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/102011143460.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/34ec05fc96f69df7792fddb9958fdcc6/75433704979.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/kowira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=real+cricket+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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 10416 bytes
SHA-256: 02d70bca57fd95c128d0fa0a7a1cf59016b91b95a740b8997954ffcfbf63dd0d
font_02_sfnt_off00010c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 17404 bytes
SHA-256: 63fcd734671701a0505ff7a5faa803cb0d4544a392379dac0c6a1baa502beec4

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