Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2bd00d29ddcc59…

MALICIOUS

PDF

159.7 KB Created: 2021-10-10 21:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a0bd9618888d9fa67688eb0d3ca2457d SHA-1: 92da714497662195ed59a920a38a31611184cfc7 SHA-256: 1a2bd00d29ddcc590355ffab5d139fa59c711a5b2e2d49d071095512e23be497
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to potentially compromised WordPress sites and disposable domains, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The primary function appears to be directing users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4473

Heuristics 5

  • 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
  • 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://marathonroller.com/userfiles/files/wevadabewifekenomojune.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/a7o5m8mmekpule2kddhd222i34/zivetotafipadaxojoze.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/sudidofarewigejiwix.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/684cf2ccdfce9362730ad89725e68b44/tapopedoromudelanebu.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/46043356672.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/65451862557.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/53774213593.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9a2ea52864df68f38a4c4bcc3e41a230/95932795619.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/gupazosoxufuxipuvuv.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/komepuziv.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/8773330483.pdfIn PDF document text
    • http://podushka.by/files/files/82458849613.pdfIn PDF document text
    • http://chenruichem.com/upload/files/punadurokirumilofuj.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f10cb9b862dc028b219b462913b210d5/80229496954.pdfIn PDF document text
    • https://breedlife.com/upload/files/98782621738.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/sazivepedogefix.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/kipezanumopazuvaxapese.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/20425085629.pdfIn PDF document text
    • https://exhibitproplus.epponline.com/mentorfinancial/page_images/file/joxogigejor.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/pepesa.pdfIn PDF document text
    • http://arucax.am/user_images/file/48458055870.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/43850144361.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/70639299842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=men+are+always+to+pray+and+not+faintPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DE2 10684 bytes
SHA-256: b1bc0ae19ca22a664adb495969c284c7491e035fe4801398f0c21456d218d0a6
font_01_sfnt_off0002368f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2368F 23964 bytes
SHA-256: 1b006efbaf8424984d6bb65ae3a210af3eaccb338eb4de120560bfc075275404

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