Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b3771b9f701ff6…

MALICIOUS

PDF

136.0 KB Created: 2021-07-07 02:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 2a8d729a672261df385d2ecf024d6924 SHA-1: b63b2ab66c6c5c435f24c9f0cacc8f1542747fd1 SHA-256: 02b3771b9f701ff6f86fead5cb68a4824264034e870a0662a9ff26a9e169031b
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4872

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://huntic.ru/uplcv?utm_term=pacific+beach+middle+school PDF link annotation
    • http://alphabodysupplements.com/newerac2c/userfiles/file/38414802649.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/77880597769.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9h5eb8c4cdchjptqakuaulm0ds/matirazegaxiluvofobuditoj.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/30ea9a6c5da4983996407b34ec5485dc/63066764695.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a9510924cb75b12aab6d483407523883/79493316666.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/p3gk7jhitlp7up9f121loa4bp7/bupux.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c29cf7b0---rizawebifibezuko.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/najipegupofusaromiwo.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a926f64183---xopipitapisuzumadujufij.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d8a56e526aa068669b6de800cc93f381/wekezujatino.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d06ebb4e7---51471605289.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd71838c36---vusoxezulinazebepu.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/34ce3ccabc9ff366f4e4801fb0e0e2f8/dobezegawirixefajijumazu.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/31032b0bcc800528ce47ff49d221a939/manajuzupejabemo.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/jufaboserasofanaruviton.pdfIn PDF document text
    • https://andana.us/files/files/99940431365.pdfIn PDF document text
    • http://airsoft1.ro/files/file/novosewifef.pdfIn PDF document text
    • http://tauzetaques.com/clients/1/1b/1b95303171b4519794d6fee637ef680e/File/xebewegesopunasifugaduwul.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/59ee95e6808de62ac883d2bf50422222/ramixigiba.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/f21600cdf40c7c40db4430b6e056589a/65354180205.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607c87d6847c0---22830717938.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ccb0f5c89109cd1a6ec9a8da7309d29b/soteke.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/112df11ecb8742ecd8a8e362a75601a7/81711406232.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/dipubav.pdfIn 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_off0001be31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D648 10580 bytes
SHA-256: 4b4a36b3851734f932dae53a9287342ce7690caf8ea8a386402f48fab7df43e4
font_02_sfnt_off0001ee64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE64 17880 bytes
SHA-256: 0739bd7c1df4495efb9a049539fa494e758f30b86fbe2563048368872d96f985