Malicious PDF — malware analysis report

Static analysis result for SHA-256 2469c2b3196de7dd…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 08:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 89b31fdc843d0c7dca8fbdb9843fa17b SHA-1: 29e3c6b817fe8b5055f92408d3cc6afa5e98c121 SHA-256: 2469c2b3196de7dd8abd27efadc9cad70c7c7f524955b8e568b732eb6fbffd75
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://sosnovgeo.ru/userfiles/file/zifasamomuxilutereleleda.pdf In PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fa5d08866---35132372863.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a413dbca503---95521934230.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/9529a286b47ee1339b8198deb2545ded/28005372654.pdfIn PDF document text
    • https://blugarden.eu/file/likefidopenuwotuwik.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe9afa2c4c---43206203863.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/75bb02d5c92f9bfb6c2940ad8f09d5c6/muxifesawixifeligalo.pdfIn PDF document text
    • http://kasargod.net/uploads/file/revepepawazapaxapijojizo.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/91463307086.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/729850657f70dfab0583918bc7b09d9f/zurelud.pdfIn PDF document text
    • https://termofriz.rs//files/79313314679.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/rafelorepujinog.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/7n9a3rumi95s9osnb1fpjpkge0/wopisuserataga.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/lp8q4ipd87bput3iq5912423a4/16161293358.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e21c4f0c64---gexepugofa.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1q6iu1kvfk0j1b6bb59gliac40/vifatedixukoruzipeju.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/luzepopanabenozipiro.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/9bbf1750886245b6a71420acd714c1f4/39053848117.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc7c726529---fofenadadof.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c483dbfe05---depipax.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/11288960250.pdfIn PDF document text
    • http://ahchala.com/img/file/21206237175.pdfIn PDF document text
    • https://ksboutlet.com/file/files/mafafukaxatafegolu.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/jagesudibigukebapu.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/03ts76ltdpuvrbkq90hqvdp161/6174813391.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d48ece9ba3ded66194ec5c5b7555a6ab/sasawukigakisasopasajade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=apps+that+answer+physics+questionsPDF 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_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 10852 bytes
SHA-256: faccc29f7a573704ab7432169b47c974575d8aff94a7cf934e844494af20f04c
font_01_sfnt_off00010519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 17308 bytes
SHA-256: c0502341f1fba9a90f5c87fdd47fa7bcb924b030ba5a4810b8d68d70135fd332
font_02_sfnt_off000132a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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