Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c117f9c45b2219…

MALICIOUS

PDF

982.8 KB Created: 2021-07-06 05:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a09b72e963090ab191a931faa849e0b6 SHA-1: 298e526765475ed10345be7f44c836c053aefcb9 SHA-256: 64c117f9c45b22196937e5adf884275583a9b358e8fea78c02b911b6dac71c9c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing lure for malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. The embedded links likely serve as a redirection mechanism to deliver a malicious payload to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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 http://lavalnerina.it/userfiles/file/58508130664.pdf In PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b4da6dc6d33---16863077052.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/guxolafirosom.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/a5ln0kmu9rshb18lbnoldh2sl1/60966920150.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/003749fce917d73d0107ff15f02c3d54/65037039493.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mcdifnaibkogi4n00eef5ajie0/99986509027.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/tiligobosafiwaxutati.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e11f206d06---bugisujowu.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aac0dfcf9d2---jupoxirerowuzo.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e3ba85aa7---kuxinekonopokilol.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dichelede65o3fpdif5faa6as0/wemivatowodoxomi.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/31c11ceaecb4ad07f14bb6aa722bb697/pofowifune.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa8e26c23---biroxesojitakuwuwozolig.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/31988295931.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/58135423316.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/jafikalururuxegulexibajo.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/92706e1007665a482290dc19c7cead0d/vojug.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f0daccff---lonotalutiwugasewupisanuv.pdfIn PDF document text
    • https://norservis.com/files/files/52919491128.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dab11c21406---vobelarowexinitesakamewa.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/34193875634.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/91296885075.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b797ddfa2469d37a1a25a4fb444e8080/xirijalilenuruzalamen.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/b3uir847hp5taq373t6ph6h925/negobofogelot.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c20bf96862b---dopavoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=chausar+game+rulesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000eea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA27 10272 bytes
SHA-256: a3937eadb38f870e9ee681172f7a7a85b30354fe8c77e50038c7a65dada2ff02
font_01_sfnt_off000f0159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000f1977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1977 17164 bytes
SHA-256: 05bf63c80aa98c9665cb42f07379bff209487cdc672b8f80d0d9f4241c9695bf