Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1c9c85b7de2eb0…

MALICIOUS

PDF

77.4 KB Created: 2021-08-30 14:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22cac4f5cf0381246d9ec875622914cd SHA-1: 941790806f9de9b5f45e6e2b56a8f6b139f04419 SHA-256: 9e1c9c85b7de2eb01c8e83eecab72f57784db85f59f4c67710d264a0e5b04323
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a potential distribution point for malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to lure users to phishing sites or download further malware. The document body is unreadable, but the heuristics and URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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 http://party902.com/images/file/79208678444.pdf In PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd85c18ce4---vagewoxufe.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a1258cc5---24709806458.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d84e9e169e0---jogevosuserofegag.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/73bb9e506f51f9d1b1406d73461932f7/69045631711.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/33909762854.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/mejoguwadamiwo.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a73c0f600cb---dadijadorokafosivesaj.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/33407ab97a0d037bf867c08e63b0bbd3/88262318702.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/rowinokevobifoboz.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b2a846f68dfb728e2ecf0cf19f7c6723/malumusazozexebivo.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/633bf28330f174f5ca9cb326dac0ef3f/1400676533.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/69892003419.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eb9140f8c---tetiwoteputarojuxekivezav.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9859a4c04f---sigonolagik.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9afe97c1---vegobabutokopaxotejututuj.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e57e371b9---32120779683.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/0d1349e95418c14a7361adc3161ab396/73070467743.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/laginat.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607db7a2b6ab8---fimon.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/469488f5e95b6b5a7cedee1eb0f6f119/zuxujapowabuvuso.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/sixawukasefikitamo.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/74000993280.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dc4c69aaa---tokawiliropox.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/i4m783lrc9ol0nek4d7p9ejpao/nulalajod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=alliteration+with+gPDF 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_off0000e4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 10288 bytes
SHA-256: b666f3687d92a894faa85300a7302d624f924fa15b03acbdcffe5ea346dccdfb
font_01_sfnt_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 18972 bytes
SHA-256: 7c997e4a67109e9ff1094c7746769ef21704b81d9b36e26981c53faeed09242e

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