Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04b102bdf687bb4…

MALICIOUS

PDF

85.8 KB Created: 2021-06-29 13:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fac2b7134d095d180929654c05bb4206 SHA-1: 2ffacd18011ef3d31481990365af6d29a9d72fb7 SHA-256: f04b102bdf687bb42f1074d15934ebeb893c15aa7ac38af96263a748e7738718
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. These links likely lead to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://infrive.ru/uplcv?utm_term=acts+14+21+22
    • http://maternites-catholiques.org/ressource/site-image/files/biwolorubepujatu.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160802592517b0---basimuropubapuwijoridij.pdf
    • https://alatheir.com/atheirwsfiles/file/soxiriwiwuxejewiwolegekug.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e0dba60067626fe81c3ceec99b5a9193/sidox.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073906f596c9---52424934450.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/47604333315.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/siimbsbap7ub2kihbsav87sjk7/89502387853.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/7aa96c934baa43188653fb0e7e70354c/sapakajakakipep.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160785c2759ac1---8710792972.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/569d6917653c074f8f577788c0dbdcd3/vamuvu.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84b6640741---salan.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/f44s543bmu5aohrprujffgdqispteeo5/komanedujevevavopepo.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9bc9b136b---zutinofabekomazegagunakit.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8ba6nf0c6qskqejab44qllavb0/75480687548.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b161147d---zidem.pdf
    • https://mecaniquekd.ca/upload/file/67319807826.pdf
    • https://adepotcustom.com/UploadFiles/file/20210506210708191.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609037f4989c3---wobinomiwulisawevotesir.pdf
    • https://danielstrehlau.com/userfiles/file/34325523895.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099eddba9835---jalatasux.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf75722d8b1---57112975186.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_off0000f109.bin
75c90cc9834b22eaafbb2333d75451f8e4d8701eee9f7123bf199f2ce149d5bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 9696 bytes
font_01_sfnt_off00010662.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10662 16792 bytes
font_02_sfnt_off00011e74.bin
14a30e24ceac4af2367cdb8dc10faa475bd9e3327c64bfa69f7478509d4e91a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E74 16972 bytes