Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba5f300d345b86b…

MALICIOUS

PDF

127.7 KB Created: 2021-06-28 09:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 002717b5d8fe5a9dc3f05274ad2a59b3 SHA-1: b772f2f8c7c92734d9b76808db8a4ba30cbcbae9 SHA-256: 3ba5f300d345b86b5f4e7fdbd72399fa19714cc7a22c1d2502ac03bb31bc8ce3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple distinct hosts, many of which are hosted on compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/nnr85orcmkhg1p3ed6q30qki4o/37221951815.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c3cbac6ec---45780135110.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/evshmskrhkaadnnlpu4jlas3r3/kemakewukigufat.pdf
    • http://travelshops.pl/userfiles/file/44834115210.pdf
    • http://bajcsidavidfoto.com/_user/file/72913086275.pdf
    • https://clearpatth.com/userfiles/file/37269998151.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf37024b9a---96082219480.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/aohknmgjum01fuqnrmb5vvaa6f/rerixilebinatir.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/21671368333.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffbc793a35---7856887971.pdf
    • http://midel.me/userfiles/file/tiwofekopo.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073f07b09c16---muzagofowo.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6ohtbmn62o4mvc7cm2vkveh7f9/567926160.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2977ab7eb---mipulenijamizikiw.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609020af67a5f---40304691112.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081de3e26027---pitinibovutezitidulirepam.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/4705473a22fc4411f5ebd68fd65986d7/xugiwajikebero.pdf
    • http://anvlaw.com/userfiles/file/pafijikukidulaxowas.pdf
    • https://festival.bg/fckeditorfiles/file/97097685419.pdf
    • http://auburn-companies.com/userfiles/files/63298277418.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b56600af87---95186414879.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/i1932d87mdhq1p50ao4l7ugnm2/76179135890.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=diary+of+anne+frank+class+10+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d5d.bin
da79484a7f94e028a8871d907a282bdc2df095dfef79f7b1f2af1efeeab75da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D5D 16224 bytes
font_01_sfnt_off000172f9.bin
b226296c26cddfef43dadbc1d3d08f8aca1b4f082a57c0d39f900aa22943b576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172F9 8044 bytes
font_02_sfnt_off00018d89.bin
fec98ac3841ed6e4566b20eb0ce50f68a9329b7573b9d40fecd3399b8652bdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D89 10896 bytes
font_03_sfnt_off0001a6e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E4 16792 bytes
font_04_sfnt_off0001bef6.bin
f96bf99b3f2c69a422d18cbfc7f5d4c7295ec1b969f863792f0e08085b40f5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEF6 18460 bytes

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