Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7616f8ad79de8e1…

MALICIOUS

PDF

87.1 KB Created: 2021-07-03 13:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4269b2ffc14a845d7cf336618c61a21 SHA-1: c08745720ca482efe2a7538ca881c99fa3d478f1 SHA-256: b7616f8ad79de8e1c6d3a77c9a268cca6812ef2450c333388d1127904de02196
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan distribution attempt. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary attack pattern involves luring users to click these links, potentially leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://baloneacessorios.com/_upload/file///19873427321.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c77eb47aad3---74752802705.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab651b5252b69590ab30e3d8fe76a248/kosedejavik.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094993ba9fa3---zisemivipewen.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076f57c95350---14822932908.pdf
    • https://aduanaldelvalle.com/userfiles/file/gaxakelumogajopase.pdf
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/24557925142.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/funukobibid.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/37751635526.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/umurblqebnns5a2d6golct7fi3/22007385455.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608365b922ef2---kijubisetor.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e2c215ce0---lutej.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db7ef0bab8---mizekawamofaxez.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90164618d---51285012365.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/q6bftg3t41aekbl4jqcuvel1a3/90199652431.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/d930283107c151569398278c2649b2fb/rudozuzatofomufudo.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a505abed8bd---mofitelotenajuzitib.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/svda1slvpqi0b4kdhc89jir4a5/36389734847.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b972c71af8c---lomodobuvidobekoviburu.pdf
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/24120809324.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a01c3aceb53---wurenimoruretilawewo.pdf
    • http://oicenglish.com/imagexx/files/diwasibitetutab.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=lissi+doll+1986
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5d9.bin
6e238815cfdf5eff546b7c60981adec787db439369e11b17af3c0de2c84c78e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D9 16576 bytes
font_01_sfnt_off0000f113.bin
6f2e89dbdb35fc4c18d9dc65eebdbcdef0c7ec8207f35017fc8dc3f8d567587d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 15036 bytes
font_02_sfnt_off0001200e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 16792 bytes
font_03_sfnt_off00013825.bin
8635c2f93f7e875e5c3c0468d82e8515b953af2ef21972161ba153010c255050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13825 10200 bytes

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