Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bab6a299a7949c1…

MALICIOUS

PDF

106.2 KB Created: 2021-07-03 06:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f5b011f08d2833e0450f8c08a83521f SHA-1: 8b361fca7c16f689bd199f07a37c1e8d4b9ebc8b SHA-256: 2bab6a299a7949c1d655798dd364dd7ac614b4b2f55ed7aad9821d0a72fb858e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially malicious PDF files hosted on these sites. The presence of external URIs and the overall structure suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607763ff7ac59---tefutapapijufomiwe.pdf
    • http://farmaciafici.com/userfiles/files/mufasakek.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a342445a329---fosovovidawu.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/ug301n4jm955oojc8ltodnh9jv/xizebapo.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/6b6d788c73a2c001f2273c5a10dbe0d1/muwimifox.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9887ddbf---fezaba.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/3848fc1607eaa17ebfe59bb36fd962f1/wefijulizixud.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609776d8c9ae0---8469632821.pdf
    • https://etonbio.com/newsLetters/images/file/xukumafapibevetufesipolij.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a1c9e7bb2---98844146079.pdf
    • https://balaji-technology.com/userfiles/file/vuvogexepag.pdf
    • https://planet-for-events.de/userfiles/file/medunerotupa.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/bebivi.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16086f088bcae7---zagobozimebiromenes.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7cb1a9b6e---44385494683.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/r488p31a7o0gul497nqg72fga1/12239618646.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed8fd6bc3---48912625768.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/q183ocne2oror6ng317p8p4njl/naxufafewiris.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9eea691a48---15475066450.pdf
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/55236167329.pdf
    • https://hondamienbac.vn/userfiles/file/57440299708.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0f8bcf08---29700509580.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3885dc390---raxezalifijarodefuf.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b160f3bcb04---pujizipafarimotiseru.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=skills+training+manual+for+treating+borderline+personality+disorder+pdf+download
    • 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_off000137a0.bin
68510892cc5385de5f6ed44c8ada0feaacc0306128085d1f74a1eb154ee146c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137A0 17412 bytes
font_01_sfnt_off0001657c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1657C 16792 bytes
font_02_sfnt_off00017d93.bin
1ca635838b690bde24b36c02a922ef4636ad2f4f69c69f3c38ec56b30edccd9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D93 11448 bytes

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