Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e665320148d277…

MALICIOUS

PDF

82.5 KB Created: 2021-07-10 12:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c86143d8e45f293c6ce194220c06b7b SHA-1: 05f3e0beee1f8412416600bdbd9cc6ca8114f22b SHA-256: 77e665320148d2777efca68113c2b648021d865de9498fd611022fc7c4510b1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to disposable hosting, identified as a link farm. This pattern is commonly used to distribute phishing content or redirect users to sites hosting malware. The ML classifier and ClamAV detection strongly indicate malicious intent, supporting the classification as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072b84aa271f---zolixidematila.pdf
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/78062931393.pdf
    • https://zohopinler.com/calisma2/files/uploads/91520080214.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081005ea67dc---42463666574.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/a6s8lr78habpe3lie0rpf3qqr2/65903059480.pdf
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/59626525692.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608adfb24e584---vamabamipeveda.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0335daee0---fuxesinodigavufodavidogeg.pdf
    • https://balarampurblock.in/ckfinder/userfiles/files/49568005435.pdf
    • http://derma-dts.de/files/file/71096989739.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/3sakfd70vqh2qrdhi54a1mapo8/bizelukisi.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e486282a7c87bfe3c0214636a4a483ed/42619345093.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7324a1da52---34284646858.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/94de40921247f3a91162b5b88f0f7bb9/38461514682.pdf
    • http://ttmplus.com/userfiles/files/6524758084.pdf
    • http://bualuang101.com/backoffice/upload/files/baxafirolemukebuneriw.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160bd563d2f652---3035122605.pdf
    • http://cungcapluonech.com/upload/files/dipajak.pdf
    • http://jar-ted.pl/file/lixebibisuvem.pdf
    • http://xaydunglenguyen.vn/upload/files/f91e24.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8bad6808---33022027960.pdf
    • https://goodline.by/userfiles/file/71248950859.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/368b66d5837da9b51b4ba38abfc20a6c/jesetidugulakobedazazufu.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/35eb216abae3b35ac48424f8ffded45e/xutabanorekogepaxitibeta.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/1e4b988e504c5acc6bd2dd55f2cbc712/72693963708.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2e70ce5e4---gobavuwujejenagitozibu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=plural+of+100
    • 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_off0000ddfd.bin
247904a0e176416b98029b676179c20dd73d07e7db0df182bf167d4695c8f3be
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFD 9888 bytes
font_01_sfnt_off0000f3ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16792 bytes
font_02_sfnt_off00010c00.bin
1dddf9c9f07f99c19337c96df24ae2ebf5033fa32dadcbe091dafd321f49c369
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 19132 bytes