Malicious PDF — malware analysis report

Static analysis result for SHA-256 42df83dcdc4fc3de…

MALICIOUS

PDF

95.7 KB Created: 2021-06-29 00:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 21c944e2391c0b1d0003293151dcad59 SHA-1: 2f0429592e1484d33f97d6c41c14d346e4bc455b SHA-256: 42df83dcdc4fc3de24c842425bdb845523e019ffe405658f65d60dab96ed5332
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple distinct hosts, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL targets are indicative of a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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
  • 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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745eeab1a4c---wenolofesilenodosi.pdf In PDF document text
    • http://doktor-okonski.pl/uploadimg/file/pumesitowonudaxeru.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/xefepir.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/rogef.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/topapezukajubuvuze.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827875b71fe---82242396175.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16084e72fb2573---naxasenumumiw.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/1niore1fpeb22kihp1tmevqn79/bezusobonuxenotor.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f8e988345e0203e1d7e3859dcc96626e/ratugusezim.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/dojegiwizasuwepoluwilosi.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/a022ba0e4abb7d09e9478bead3c69303/44466923732.pdfIn PDF document text
    • http://ge-mak.com/files/18222788801.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b89ccd305b8---7163222751.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/42265535093.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/754797158.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/34764440735.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/d77fhj99i92b606m7uf2ekc432/sofokugib.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810696aaa49---91679156462.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2c7561517---92130288535.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/fnbe7po166viiu5rtcde703ka5/wufinijelazudukutobuziga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=lady+finger+arabic+namePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 10596 bytes
SHA-256: d856211906687f2d892803929077586c0cb369f3622883eae33eb0db548bb9de
font_02_sfnt_off00012405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 17304 bytes
SHA-256: b5110d048de1bccfdf8978f8a72e878a4fe2f9cfc171711b4064c54f3a1dc209
font_03_sfnt_off00013de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE9 20136 bytes
SHA-256: b6f7600cc075c48e396b3d870e0a21250393954709894b3910cd8e4670af5f44

Open this report in the interactive analyzer, or submit your own file for analysis.