Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30a97b56e0a9ad1…

MALICIOUS

PDF

79.7 KB Created: 2021-07-27 21:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 924c5902a71b26734ff6d27208fafcda SHA-1: 650992aec90f7f591fc0afe4be70a3ef1a2e6f60 SHA-256: f30a97b56e0a9ad14f2c8e2fb1ae50a9447920121c12acffda892db998c51198
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 0.8322

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ingmarcofaedi.com/userfiles/files/50949929470.pdf In PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/21559520617.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/324f2ca77dd2dd4704762263c181b5fd/tulagufuzani.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/7vi63o23o2767cn8rfs13n6a7u/sevatagofobulemadedu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc18e9d2a4---gitiraxerulewapakof.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/11733812838.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e3251eb3bd7faf3511a78c279ecf20b0/26194716864.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021510208581144.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/gupeseture.pdfIn PDF document text
    • https://fratellifurloni.it/file/12438837572.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be2769a1787---2536681223.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0e766de1efc25c5223d02561d1174fa1/jubiw.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/d4t2mim3i46q91lntmkpqalq13/tinosijalo.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/dunitosafexiripupubivat.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/niluripixebug.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/5djnjrip4kak6f3fvlgrujvr70/64777676258.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/d77fe9022aae8122a71e0add611ea378/bikixez.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/iaslv6pqk249u7dkp4l0revsd4/zakobumaga.pdfIn PDF document text
    • http://renknh.com/ckupload/files/19614509242.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/f1cb27d4054ebc5039e0286a6b9cee91/97871897518.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607331fb39284---48322217859.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/bokidapawaxafet.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/c95e4912cfb98c2ba3c1d594e7817c32/99492011652.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202107160144525047.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/50059844288.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/91111773465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=omsi+bus+simulator+product+activation+key+offlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3F 17120 bytes
SHA-256: 918924a1e61a53923d9ff61a001020a3d5430c1bfb62a53995994e8cdd46ceda
font_01_sfnt_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 11320 bytes
SHA-256: 48bf8417170b0ae5b3ce2d88d593473d9be40f20324839730ac3d030c4210613
font_03_sfnt_off00012960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12960 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8

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