Malicious PDF — malware analysis report

Static analysis result for SHA-256 696a883b3a9ca43a…

MALICIOUS

PDF

97.8 KB Created: 2021-07-09 00:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f59c97e1b29aca10fe01a3d331068bc SHA-1: 303c5a96e6c1b7fb290406d0c68b547da7d9218f SHA-256: 696a883b3a9ca43a84b045dd1c3ea3cf8ec5e9b494887017f50764b3403dda7e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to direct users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=my+weight+in+gold
    • https://noblacklist.pro/web/img/podborky/files/53492681260.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/r5mm81r0jvm6fg2et5ku2p35hl/zogekogivakura.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160daab846d8d6---kipedefogorul.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be37124c8e6---16254313731.pdf
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/85533954011.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b9fa2617c33e129073f8ef706e6746ba/79770802820.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/8113631802.pdf
    • https://laetitiabernard.fr/images/file/43619079626.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67c8e7833---tovakij.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b0cf9954b---34557368417.pdf
    • http://uk-finansist.ru/userfiles/file/lulijakoloxivakan.pdf
    • http://ahcxdq.com/uploads/file/300022498615.pdf
    • http://emannsltd.com/userfiles/lalimozenezuxif.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c61005f63---45073747026.pdf
    • http://wooshin.kr/uploaded/file/65154852960bd30392f650.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a5e0736c58c3873fa1f581d3f24946f6/nimuwegipedefi.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/3a8de8e6d4b20fea6efb9b103b62b518/jidizuxapur.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e76a64055c7---rokop.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/82f03a4fb9fea668c0da0ad948762495/verawe.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098df67dd839---vumawedetijapugofipil.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e89dcedbea0862e3cb9657f99ad86386/jenojizutitami.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608227d0c482b---raruwa.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/dsct720vq1l2422cjeb88v42hg/65098039121.pdf
    • https://nucamsa.es/userfiles/files/nirijuvibegefukepofemo.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f69eb6rv22t8oreriljebek950/jimeximosu.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/894af361afa0aa8d31760db1af1a9874/vijiripoj.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/958e4235e7757ea48e8644a74fb5bd5f/28837454026.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe9e.bin
b1ef7b52ed35dfd01120c19ee4193d967dc828f2fc549fe1a2d8c3c5029b4647		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 16244 bytes
font_01_sfnt_off0001148b.bin
e52994edc865cf26e3177e8eff7ca24d1792bbac139cd1223cb0c60ae751fe38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1148B 10292 bytes
font_02_sfnt_off00012b74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B74 16792 bytes
font_03_sfnt_off00014386.bin
bc21b0bdaa70e502bfd87297be914d319cc82deccb5990a1472f82b5a313ff6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 21528 bytes

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