Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e09baaad8206c7…

MALICIOUS

PDF

75.8 KB Created: 2021-09-18 04:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b17d6e378b786ad7392e868f8f940994 SHA-1: d394a647434d96fec15b40e479b1c32424e8a59e SHA-256: 22e09baaad8206c776a92f3dc04518a1e9566916baab8d46ee9728090fe2c170
156 Risk Score

Malware Insights

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

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 external URLs, some hosted on compromised WordPress sites. The presence of numerous URLs, including one with a 'utm_term' parameter suggesting tracking, points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://chcial.ru/uplcv?utm_term=hacks+among+us+ipad PDF link annotation
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d252754d55---13226489754.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/batupixoto.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/22881155448.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7gadnjvg4sfjo7bti6ot2hjnqm/tunuvi.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614030a792366---fiwofaseliloxibuvarow.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131085f85034---50787716667.pdfIn PDF document text
    • https://guanlai.tw/uploads/files/202109091658442233.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/lufedemuxebuzatikifidif.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/gudotomiratipug.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d8ed63c7---94609389858.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/34286169781.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/54015321900.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328fbe34285---98907745673.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/32949619801.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/13009672365.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/noxoxajevobejozo.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/relobuwojuvuzufogane.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161353bc23bf9a---tenepoviguwelapuk.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/67213126224.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a4dcce63196edf455e83458870e3c996/69557676178.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/55682557030.pdfIn PDF document text
    • https://motoralbini.it/files/file/1409315957.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/tamikevufizokimal.pdfIn PDF document text
    • https://ccskin.com/geektic/files/64739680896.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D0 17896 bytes
SHA-256: 4991189d234b681f266dedb9ca52102d02d20ccb2ec3daa99e0e76bab46dbf93
font_01_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 10664 bytes
SHA-256: 9228d331a91f5997f4f45a108cc769f342ee55b12ef12cacf6b13fea79b0832b

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