Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b2f3fa1596de8f…

MALICIOUS

PDF

74.9 KB Created: 2021-09-06 04:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 955239bcc6f855cc93d8cb777f21ea8e SHA-1: 6520620077e43fe679923b632b1aa1df899ca56d SHA-256: 29b2f3fa1596de8fb812cbadf5642b332d65af40856dc9b51b3dd0d62971bdcb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV and an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious sites, likely for phishing or to download further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://medvor.ru/uplcv?utm_term=tasmanian+tiger+catalogue+pdf PDF link annotation
    • https://weboonline.com/ckfinder/userfiles/files/jexogevatidijexiwedu.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/76276001705.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/7vncj7ppb14ur36n7uvr7nnoq4/juganebasabu.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a560ecfeb---kenazovudipixuropo.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e764d20be---gebanalusozojubami.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/90851408302.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/gesugaperukafarafon.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/51338658644.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/tiwamafojijokeviripitu.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/42433825794.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a72fa73cc---20542670965.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/togufisimukuzib.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/94764493222.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7fd71f9c6f1db4fe12e39c869133a0a7/7736067826.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/vc04hknbrsmqgh1ricp5c6putt/futosidib.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/furisipitasirawa.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/jigugu.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/14401898684.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/11736943898.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa4b2f370e---53876815587.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/bevixafudum.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/16042684843.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f1c58624---15055903859.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_off0000c05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05E 17172 bytes
SHA-256: bd0895c8dabf1e92742b04104587030eb6501543b2335da4c2231ec2d1053639
font_01_sfnt_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 11024 bytes
SHA-256: e9f417e3413034eb4d62cd3e647ebe90d91bdfec7f84b6f9a40debc488e6e07d
font_02_sfnt_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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