Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2541465a611f496…

MALICIOUS

PDF

71.3 KB Created: 2021-09-05 03:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 040b99433a7825a21132bb43c452425a SHA-1: 8a9a26d9942e7fbeb5ecb5a0bad75bc331fd60e1 SHA-256: e2541465a611f496288133082a45176fa0e4e544de7b99211d4fc5692091b805
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, indicating a link farm designed to redirect users. The PDF structure itself does not contain readable content, suggesting its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed11a7a95b0---35384163738.pdf In PDF document text
    • http://anvlaw.com/userfiles/file/nafenororego.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075791158fb7---43479715592.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf4f513e49---zexunav.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/69a84bc55cfe24187721adac436baca8/vavasupirisuki.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/76342571515.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/gawapukafanibasotu.pdfIn PDF document text
    • http://cci100.com/clients/57496/File/xowetalagebusiwupigipoje.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b45a2019f3---xusezimoguxuluwup.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/vazometerajizob.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/87647459181.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607579301d44c---92915044991.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/berezose.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c154d491526---jodewug.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/favifegud.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/71749195881.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/19409213019.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/7701104015.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/vasoxetofizajugixazewovox.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/jufakadu.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/jakedelisigimesenaguvod.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/55f4ce43cf914cef59ad7ba5d2f02cfd/bituweputane.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/10343064622.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+stop+deforestation+essay+pdfPDF 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_off0000b872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD089 10636 bytes
SHA-256: 76e14c42460d20dfdb18cfe430d7db147b9fdd7a36b6f73e999c428115fbbe8b
font_02_sfnt_off0000e909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE909 15072 bytes
SHA-256: 357f44510e1b6b8bf433433e3b941006f70efb4946359ef28bd0dda70c93a9ec

Open this report in the interactive analyzer, or submit your own file for analysis.