Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd37022e8f905fbf…

MALICIOUS

PDF

90.4 KB Created: 2021-07-14 07:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8884f84e7e65fcc2237f888ae876e122 SHA-1: cccf98f9743363b02d04a6f3613e3c9833775022 SHA-256: dd37022e8f905fbf409b9102dfe81e19b57999d62e52e1ffcb4acf2af605ce7f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a distribution network for malicious files. The presence of 'utm_term' parameters in URLs indicates a potential SEO-based lure to attract victims searching for templates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://huntic.ru/uplcv?utm_term=free+ecommerce+template+bootstrap+4
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918c8d8d050---zajawajirure.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91dc6c9828---migukameg.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/90s8vi16o5o9cle05huc743lr0/8575964306.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/37145247377.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f94f5fbe7---77654864572.pdf
    • http://jullien38.com/ressource/site-image/files/7197960002.pdf
    • https://watertorens.nl/userfiles/file/wufidoradeve.pdf
    • http://gpszone.hu/upload/userfiles/file/77342741366.pdf
    • http://driver-jazda.pl/upload/file/xudiramawaroririlud.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/gn9bl4ddb7cdv8shuc1v4bo6g4/44777602482.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607990943f26e---45032705382.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf41c3c5aa7---keluboxugalajoramozof.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/u7o2ubhp62a0og04brga2jc7ns/40869020218.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad163dc2267---30277917280.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/80372ace81970b54eef104fd0dc19069/dejozupanonurepafa.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00cc7a4ee---sefetowetejipuvavobaguse.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822800cbefd---sunadeviluv.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5dcb4462be---75471040433.pdf
    • https://krono-original.vn/Images_upload/files/92535836261.pdf
    • https://astek-telem.fr/userfiles/file/87553394504.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c749ab20af9---23762307082.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/tm2dkc8q5kmh0mpv234ro65ovb/soruwuvo.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/f581b9a6ee24991524f48201ec1a2a88/mujexerineforari.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 16792 bytes
font_01_sfnt_off00011683.bin
f12fd6aaac6e0a4e9842ed70d6763cb0b33923d2fe3474a45ef935906d7b473c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 10532 bytes
font_02_sfnt_off00012e58.bin
cf7b8677059605f7d2ce38fbc17214fccd210590a70598f0059203e75a346ad1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E58 17644 bytes