Malicious PDF — malware analysis report

Static analysis result for SHA-256 6143feb27c7cfa5b…

MALICIOUS

PDF

69.2 KB Created: 2021-09-03 01:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd24de48b5a8d695b06aaf90d2ec45fe SHA-1: 01c5610c5f72bf5b6abc4190d15a9c9f885e9af2 SHA-256: 6143feb27c7cfa5bfdfbe0b294583a775e114000e15d6eea7f7e3e9a8b7c2d4d
144 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, indicating it's a phishing or trojan variant. It functions as a link farm, containing numerous embedded URIs that point to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The presence of an IP address literal in a URI further suggests an attempt to bypass domain-based reputation systems.

Machine Learning

  • Nyx PDF Classifier clean score 0.2445

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6ae68648e---nonixug.pdf
    • http://babywagen24.de/userfiles/file/41266031474.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/8u3t8ekrbitkqeeh0811dj2l8m/4637828743.pdf
    • http://schnauzermountainminiatures.com/clients/17729/File/17248290461.pdf
    • https://naveenent.com/administrator/imagetemp/file/bokanubisedi.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/91909833976.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/71ohfqhai5d3ughuc2h0bvkng0/62800884689.pdf
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/35128502927.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-31/20210531161316456930.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a7fbc3358---vanun.pdf
    • http://vamaconsulting.sk/userfiles/file/sasituraxalujino.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ffca962dc---33373267938.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/43a8417d06b9c4189bd41217607380a8/bowosewiralujav.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ea0ddb16b---lemifotum.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6dc0b672e46675092263dacf8d52d41f/6752371600.pdf
    • https://sce.tw/uploads/files/60e4937162a89.pdf
    • http://157.230.241.115/image/upload/File/29664940654.pdf
    • http://miydz.com/mingyi/images/userfiles/file/zufuweferaxugib.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/29158d8bb5a56450df7f8c5ad920dd68/98781514569.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608249bcd4c95---pofuruzi.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/maxulag.pdf
    • http://jjkxmy.com/upload/files/202107062357125951.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c03df0425---tomevab.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/45323487222.pdf
    • http://www.tobywells.org/media/fckdir/file/ginizalotawuximikago.pdf
    • http://bajajsports.com/userfiles/file/18526450609.pdf
    • http://tccsrl.org/userfiles/files/fajiwof.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=caracteristicas+de+las+ondas+longitudinales+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df75.bin
a0cf656fdd2ee97086bb01ed58be850f3e18e0d7ef168d3a29a3f9d8d84d0492
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 10928 bytes
font_01_sfnt_off0000f8b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 16792 bytes