Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a3a3f7b78953f1…

MALICIOUS

PDF

85.1 KB Created: 2021-07-13 19:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1825d0bba83c3427682b7e9acbe9f961 SHA-1: bac2adebd62d6a560a6171e0efe61da43798187f SHA-256: 22a3a3f7b78953f1dbd186bfa5d7498450d31e24e1e0689762be054463fe55a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pistant.ru/uplcv?utm_term=space+marines+8e PDF link annotation
    • http://krevue.cz/UserFiles/File/magusuz.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607934b3aa957---35668342796.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/8c2a1c420ba9d82fa81de2c50714056c/229488706.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b245f15c727---detemujobetiwobifalifusib.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/31058997164.pdfIn PDF document text
    • http://blackshirts1961.com/clients/7/71/7137ee3fbd99c17d296746b31d66a47b/File/95316385087.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081a4d6936c8---31254740545.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/balovur.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/234d55d37d918679a516627f53780b22/robazekowekupu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607514fef0ec6---49255249262.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ed30d1a6418---78196601071.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/pimajakatopemavejuteler.pdfIn PDF document text
    • http://k1a.ru/images/files/file/29927103331.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021060516120890.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/mufagotenimoteroxexeg.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/jewomobubufutuwovusijirip.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b702ece35---45182336318.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/15876769536.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/57296626583.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/4599991815.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/javonudire.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/7198792819.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 10552 bytes
SHA-256: 6f56b9d385d5a7fdff5a4aa931e634a1b6c131a15688fe78d4a7d10a52976392
font_01_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 17164 bytes
SHA-256: 0ed2ca557a99395ee9fbb1c79dfb4eb3e350f6b4dc9c8e6b1590afa11f1230ab
font_02_sfnt_off00012fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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