Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e683dd65a7c95f…

MALICIOUS

PDF

78.3 KB Created: 2021-09-04 03:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 194b2255c2112e7069ef20b3ae9c84d7 SHA-1: 42306cf8a73d9f6bea7b6a373c870a3d2682a6c3 SHA-256: d8e683dd65a7c95f3a3ac5bbb58b38e0e097234dc3aa1954ff6a4563386f5242
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://sharise.net/Uploadfiles/files/32463805292.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c00ea7670f1edf797f4fc33df49cf571/34555961574.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/73957193215.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/ad785836a1b3dc6542c31f3090f901ca/1247795240.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/38180575332.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/37677376096.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/56349409431.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/gubisojikopekana.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210805_9B3EF066F695738D.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/a0be0edf1f8c76b6977f87322ef6672e/72053840906.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/78979596069.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161108f0953ca8---62677445722.pdfIn PDF document text
    • http://ewtch.com/upload/files/17110849714.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/94493253917.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/movekamabesoridasikurizis.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/269b8bfb1b041f8cd3dcd55583314514/dixasutolavetegetusopiz.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/47171370538.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/19ec6qpt9i0t7hs73vvfbeun86/33910414604.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/79042737361.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/wuwojamipokepewuvitux.pdfIn PDF document text
    • https://educhina.mn/editor/files/nusokulapu.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/0l168ofton1gkqvdftq4qnfpf9/ropufujarenebanur.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73c972ca22---37828700068.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b4f657218---84204921755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=inductotherm+furnace+manual+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/mijomuf.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_off0000cc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 10676 bytes
SHA-256: 4b4c28d83fb87ded3fa664b18c57db7761e8038c229f9cf528aa13c60a3fcc4f
font_02_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 18080 bytes
SHA-256: 67f867cf8129524fb00328b81c828a625e80368385e9ffa63f3ccb5e2d7f6c4f

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