Malicious PDF — malware analysis report

Static analysis result for SHA-256 304a8285a3c568d3…

MALICIOUS

PDF

89.2 KB Created: 2021-07-09 13:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 746dc4657404f344e73d24c42475ef17 SHA-1: f9fab812ce6446657f50264475ae235f77d6acf9 SHA-256: 304a8285a3c568d30fffb0ca3aa89507064fdf39a23c188f0bf6c2aef20f39f7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://fashionflutters.com/ckfinder/userfiles/files/tefizovageketeluk.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a85cd4d092---gosori.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7122a3d905---lewavodiju.pdf
    • https://digireg.cz/upload/78594895565.pdf
    • http://teknis.it/userfiles/files/bomelofesudebu.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b148fe87e5d---pemevitemomapekif.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9a9077052ccedae4a015b2d835ae10be/70357001225.pdf
    • http://jrpst.pl/userfiles/file/momasovejo.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/22h9g7bjvruntlq7v556fr7pq4/pasababirilusuvumifodoko.pdf
    • https://hohsingfiber.com/ufiles/files/90587996924.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aeff8942b.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3fb282a854f25970ca4bc0a77efb6cc7/xiwefuvizatuviwawi.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e48f50deb7---tepozuzefotusajewavo.pdf
    • http://haai.org/upload/file/76140642574.pdf
    • https://datajournonepal.org/files/40708652892.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4171ee597e---22870575828.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/mhsinj9magbjdu6l5avp2bhctb/fovutinopovorujipar.pdf
    • http://esistore.be/userfiles/file/55279557071.pdf
    • https://heatingboiler.ca/fck_upload/file/15645107697.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/8c8544508dd6f121dde30325efe20719/79389171517.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210531050936.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae40e603b97---demotagug.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/40e306c5a60768e1183f9a6d69a72fd3/63458924014.pdf
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/rereninifuzadudukalisugov.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/df89df2fb162d8a07a3e00fd289a99bc/lojetozupawopovaf.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1f5fd1926e5255460a545560ff56d692/24826898945.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/23074f04337f5968d17fef8b364345d6/16704871774.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+rock+movie+streaming
    • 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_off0000f70f.bin
0e13124904082cec857d2ec189b48e0ac170deed7e2de386a3012f8b016cccb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 17656 bytes
font_01_sfnt_off0001250b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1250B 16792 bytes
font_02_sfnt_off00013d22.bin
a6dc764dce0a80c18489d3ec26da7cffdd4f9e11c9d44091e56772338734d776
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D22 10752 bytes