Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b17e2ef8b96a70c…

MALICIOUS

PDF

84.6 KB Created: 2021-09-02 04:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 099d709cb0bd783160b2c59310976df7 SHA-1: 42c2229ee0657e34918648f411b57e6f6d23462b SHA-256: 2b17e2ef8b96a70ca35ecfbd00000a2e0d7a3fc55ee2c39f4f4cf3ffc7fda25a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories, likely intended to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a pattern of using disposable hosting for such links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/15d7219d7b8e335be2eb38f4a042a056/garivunilegonubusid.pdf In PDF document text
    • http://a2kat.ru/userfiles/file/98803355102.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/e71d5a87ef6c1cc7296a9299d047fac4/32561593058.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/79531683170.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea0f9633d---xemerazuzojovovabazaloge.pdfIn PDF document text
    • http://thepducphat.com/upload/files/rinapejatibu.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/61627304484.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/larubenisasaruw.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/28127918287.pdfIn PDF document text
    • https://aneri12.cz/res/file/65505631924.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99961700874.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/79290fed53630e85958beaf1b1bcc133/vikix.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/82120109759.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c84f479122f---84686220967.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/7ae9d573d4cbfc4b13542939d01de1cc/waxadenudugarumozi.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/fagizakefovo.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/birubekirezivuk.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/jaxozodob.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/tonamez.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/52954426585.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/vqtdcvmfsv4it1qpv7lg91ch0m/81464438094.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/54c25ac81ee4b8cbdcc7ce2768f860e4/19759350548.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/5p2j7kot6lbl2l2r6h46qqug5e/26221926183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+long+does+onion+paste+lastPDF link annotation
    • 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_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 10544 bytes
SHA-256: 7efde9e844d32320c67f66161e5bda84b28eee47f3e80695b66f2231d786d5cf
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 17984 bytes
SHA-256: 4992428c94ae47a1495f28e19826758cacb64d7e34f00ef499c82e3f8176bde8
font_02_sfnt_off00012c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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