Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d03d8e9ff672ba6…

MALICIOUS

PDF

87.8 KB Created: 2021-07-21 01:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ff2726d80d7bc9f8cb5a55d7bdd07f2f SHA-1: 448a290b763f652992b0dac12ff64f48cc472f4a SHA-256: 9d03d8e9ff672ba65c23b560f4b07c61d18d7e9622dc680b092c120a81b9a667
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, with numerous embedded URLs pointing to potentially compromised WordPress sites. The primary purpose appears to be directing users to external, untrusted resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c392ca1b4---wegogubatozadali.pdf In PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/de2b478737281b6e3c592a8cf98112fb/lipuzekopilegizutef.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4a997783bb1c693647b6971073e91e8a/folabuvabisomur.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8495b061---moneneforokiresatezulofa.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/97690375377.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/98655060403.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/45035249835.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/29af0a587375f01443b93d1ccac9865a/59676981513.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/m05df61l3ccje5j345ni84jl1h/12689121609.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a5dbef819---71152559217.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4a50ace6efa2454c601fa82af4665f13/ruwamunupada.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc224ded7---39975102904.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/satatebudizelu.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/38594842018.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/32788283371.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/6f0nj04jhlq7d59tt96ljr23j3/61776986844.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/nevinokilakolad.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/59326478630.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/dasemixu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2ae8fe52---18860783048.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rbktlv5kfe1thu2qb7l2156hm4/50952850879.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/44585495860.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/lizajadojokidogoxiwa.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8844a994bf---xizomewanodemufiveb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=know+your+worth+book+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_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 10520 bytes
SHA-256: eec90f53aedd7e7dd015a3d25ff05376636cfe648be5021ed88dead9ea9311f8
font_01_sfnt_off00010eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB5 16912 bytes
SHA-256: f848accfbe3f73875b182afe4e4f6946e6cea753637618b785e4586e5402e095
font_02_sfnt_off00013a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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