Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1059e257de92192…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 20:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b93fb4fc711032396fb672f78e00ac2 SHA-1: e67045a84cfb90ba5eb0e39ca8bafc954eb617fe SHA-256: f1059e257de921928761499e0e4673f174dfddd61422d9752bf3fc111d7f3623
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://bjeclinic.com/ckfinder/userfiles/files/visivapanegazalifes.pdf
    • https://oriontradecom.com/ckfinder/userfiles/files/karovogebe.pdf
    • http://cncforginghammer.com/d/files/bukewininan.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e5cec00549bceefe94c330c659382354/22628304894.pdf
    • http://willbramephotography.com/niliz.pdf
    • http://tomaszskiba.com/userfiles/file/riruxujemoxonoguledakubaz.pdf
    • http://perles-del-beya.com/userfiles/file/54889641443.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4ad47a047---vudetololezewigoleji.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607945e875f47---88775470648.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/dbc6fc9fea246d43198dacaa26dfe363/56302188109.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/sg5g9psir9sa693mbbkps46k95/tudosisoxibudiwerimotexuv.pdf
    • http://toyotarentcar.net/FileData/ckfinder/files/20210708_52EB7C1354FF4950.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e709aee905b---64863779132.pdf
    • https://oddluzanie.net/userfiles/file/13587503233.pdf
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/fesox.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/e9q4a3icakq17as5jq0oj2fsbu/puzeniginakuxunilupulifes.pdf
    • http://resetimpianti.it/reset/public/file/xajejetutekomobatuzeve.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/0369d3b2de99b05de670998c7a90fe15/ronatu.pdf
    • http://irths.com/upload_files/files/direpefepobofitukapenozu.pdf
    • https://kabelkyaobuv.sk/editor_uploads/files/wirufu.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/39981615492.pdf
    • https://aldwalia.com/userfiles/files/28749613484.pdf
    • https://speakingparrot.com/upload/ckfinder/files/kagobusutiko.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8be343fc06---5852951156.pdf
    • http://gildiamasterov.ru/userfiles/file/30706760783.pdf
    • https://ambient-interier.cz/files/files/riwefoluju.pdf
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/bitexamesu.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/3cb2b9c109c000f72fdef2a14d6e9584/73058372904.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=prentice+hall+world+history+the+modern+era+worksheets
    • 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_off0000d693.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 16792 bytes
font_01_sfnt_off0000eea5.bin
42f93c713f575e555950d3d44657819ce982542a0f62a25a144d43d62473cddc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 19608 bytes
font_02_sfnt_off00012083.bin
6c90a656624d14f9c902a3190bf09bb6615f971985737657fd4790f9a2cd276e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12083 10928 bytes