Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7c2d35f06dee83…

MALICIOUS

PDF

77.6 KB Created: 2021-06-26 01:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: e74abf0e7399224b2986d3e3c657b821 SHA-1: f64f25d6004d5fbade3416925b0ad48508cfb065 SHA-256: 7e7c2d35f06dee838c21e8e39c6f3f3b51b6922ddf9fec788ee1b9d29f05b49b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.5355

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://allytemp.ru/uplcv?utm_term=the+fourth+bore+tap+room+%26+grill PDF link annotation
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/gd5bfeginb18rlm66aqaeer27d/volaz.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/ad3e576d676cda216650e04597434bba/fidiragadepodad.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c7e9d8486---74399052433.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nelitifa.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160733e4e9f4a5---13666107019.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d82a5a6afb579e3d48d72487d2707c75/warevuwup.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa3c1958c3---nifevuzubadegoxukusifabu.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/20987226506.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec6f558229---36984359899.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/p2o8g2ojf99de5isphsq2ek92o/bamiwujuxavedixepomawazen.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/70522830502.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160714bd0e3fb1---dubapew.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c3efa8a---fonekewogelavuwizuzedi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1abb871bb6---jinageneposorutud.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b2b08389---33257668870.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e950eee97d---rejizaxoxixox.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/38818f1b2a3cb3c59e638595b97f17e9/busuloxamifizarefutewuro.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/d028ec309be935544c40e6aa66e6dcf5/93973549142.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5851726e2---jilosazofinugeb.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f620147bb4---93240022471.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16092e55081e03---72251104488.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/347ee392d44df1b0c6ced8b4da975523/20369845777.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/nepukanatefuzofotibosebu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a66bca03---setikug.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/95503651937.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_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 17860 bytes
SHA-256: 98e4bee7a59c9d00387d57a97196f36e142a64f36ce5de3396903a9de0619c65
font_01_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 10416 bytes
SHA-256: 88762d5f42f230a39fec58e75fddb8eb0a142a33ba775d4ff3021a2004112982
font_02_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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