Malicious PDF — malware analysis report

Static analysis result for SHA-256 360a6af9740d382a…

MALICIOUS

PDF

63.7 KB Created: 2021-08-28 01:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 14d478570041dc50484509460a8637c3 SHA-1: 30a69bda198e7fb91eacbb6b9507bf40ea74c222 SHA-256: 360a6af9740d382a3f69453f2fa5a58ac75eeb8f46af860ebbec6db26324be61
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to these external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6520

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.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612610c3676ff---xunezibixowaga.pdf In PDF document text
    • http://pension-erlkoenig.de/img/editor/file/basefefazejokiruxeba.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/bufajanevatikozibegenare.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/4582acc6bb6dd430f43fa5c87b763db6/dupimotivojum.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/an9v6pptnlaavbq5nc6mmtcp4j/64976629684.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/22df6e4e3f01f81799ad9026f92989f5/80693362718.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/kadurexatinibokumi.pdfIn PDF document text
    • https://synersys.fr/contenu/file/83168426746.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ip4fni6t2k4l7pq3gudkfclubv/zizoxugopepuvizamox.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/18613702092.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9167ef2f1d---59273874998.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16087e767ea543---60722296106.pdfPDF link annotation
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607419cff29b3---ledinijodixagariben.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/01f9c01dcb18474a592bf9d73def8b04/tiwotibivuzeki.pdfIn PDF document text
    • http://termocity.by/pics/files/widimig.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/gevubitegezasifivazebakar.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/rarekeruxenefipefikaf.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161292e6ba3176---41778840048.pdfIn PDF document text
    • http://steinemann-ag.ru/69493200392.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750abe87395---bekikunukevowifex.pdfIn PDF document text
    • http://patroha.hu/file/lijerurup.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/bezegakod.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/90695283389.pdfIn PDF document text
    • http://watchimport.eu/userfiles/file/juzokikonup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=physical+characteristics+of+deerPDF 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_off0000c141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC141 10584 bytes
SHA-256: dc9be167e9083e803b37bbfef7554d3e83e7f3afd58de74e484cc408bd68c0b8
font_01_sfnt_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 15816 bytes
SHA-256: f3a95ada6ef8fd73a10ed619247a20dfb668db4c6412936d83ca0c3c32906c0f