Malicious PDF — malware analysis report

Static analysis result for SHA-256 586d2f2ce92e846b…

MALICIOUS

PDF

90.0 KB Created: 2021-06-29 09:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fcbaca866ddada6df5fec803ff1630f SHA-1: ee45ba514a6ad4323237c0b5b9da21713734d65e SHA-256: 586d2f2ce92e846b7bdc61e429f33dda72dc6a551377d163b14c21d2fabff72a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains an exploit. The file functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://wastran.ru/uplcv?utm_term=2+story+townhouse
    • https://twr1115.net/files/fckeditor/file/lipidawuvaviwebogul.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a84713502d9---vojabez.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab182a12f---58641187467.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62d5bdb2a6---30548293426.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986171dd005---72328854436.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d3fba26f2---tusen.pdf
    • http://bulk-supplies.com/userfiles/file/34597087262.pdf
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/1bht0ur66fai8k0fiaia04jeqv/81212144902.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a0fedcf408ce3d00615bbaad6aafdfd2/48836864111.pdf
    • http://wtmongolia.com/materials/file/dafubonejeraranikefopixiw.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/a1mbo633tobbhumk49piod8nr4/91040765865.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607244184c2fd---mebodobedotixukafetaniv.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b6085f47d---13638619287.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d06afed30fcb565cbaec70fe0ee24b58/20466515993.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/46df577040646b5901fd4072147a514b/fifebobogorefukobod.pdf
    • http://cdwy028.com/uploadfile/file/20210624021447.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a58ef436085---lozatakusuj.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/996ec0e83f11b031c83d7e1f82c26526/gupoxepodatexerafag.pdf
    • http://banglenhospital.com/UserFiles/File/tesumupaxexekef.pdf
    • http://sosnovgeo.ru/userfiles/file/tugorejejaxulap.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608018d5891c8---71970344257.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfbe02e0b---26734540633.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 16792 bytes
font_01_sfnt_off00011374.bin
6ccac7337a81fa2f2a6a777b24abf6ca9215c29f603481bf9679be6cff89b798
pdf-font-stream PDF embedded font (sfnt) at offset 0x11374 10228 bytes
font_02_sfnt_off00012a89.bin
b4532197da9645719b80e5f64b51508ffcf16691891fbc8ecae1542ca68f6c1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 17912 bytes