Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69975d39fd42393…

MALICIOUS

PDF

83.2 KB Created: 2021-08-02 20:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5075aecbd3fe7b8ff10587b165655fad SHA-1: a8ab3e9a180feb6ceabc0d10265edbdfbba58a16 SHA-256: c69975d39fd42393b29f5fb46b2916ab21bfb954c2e945ea29544e84398f8e08
126 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious intent. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3396

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://garglob.ru/uplcv?utm_term=best+workout+plan+for+women%27s+weight+loss PDF link annotation
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609211ff74888---jomenotupizimekibazagufo.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/529278672.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24f5a6defc---gijobiwoseza.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/rexurupovaxudukoludimewes.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c1fd484fd---64342168972.pdfIn PDF document text
    • http://altinay-law.com/images/file/26444147800.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a565859ab1f---ragenijazan.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7d147d2f---69840538325.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e4f66d2e---pimutovinimakuri.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/98221612800.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/fugajobupulewomokewobepa.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/samuwov.pdfIn PDF document text
    • http://fpole.ru/sadm_files/pagavat.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f9bb8a2113ad44f37ffee88928b4d16d/saxoxasovaxevik.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/wosuwevitezirokigux.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/94327322713.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/10b6h83g0l6i3c8jbi8aagtf27/xugulizigevuwaxomiferi.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/ripafesidijuliwuvoxikefow.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/61e72668c1184ac0a274e135485578a8/73327694812.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1452c1e498---vuzapunuxokamidul.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/s9euo7jg797gu3jvtlpsal9i4h/raviwololopinefe.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4fd9d49b---kakovozobikizuwusajup.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_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 16968 bytes
SHA-256: d277eebcc6131894cedbbb0e071caf49e02bd649940f630458b28c8e0e2f0242
font_01_sfnt_off00011a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A75 11168 bytes
SHA-256: 1d6945db426946ceaad8963791bd5abb691658c4394f41a999030f4de8dd5bb4
font_02_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1