Malicious PDF — malware analysis report

Static analysis result for SHA-256 acba9059778b7cf7…

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 17:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1083e069e605fdf2ddf5ba14320fdac9 SHA-1: 479c1e17a5f7b643de6426cd80f094f73a612e98 SHA-256: acba9059778b7cf7e7a272e74200703d2413921aa386d50f8bc8cff6100866a3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of link farms on disposable hosting and compromised CMS uploads indicates an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16079a14e55129---55434814047.pdf In PDF document text
    • http://biafrapol.pl/pliki/file/35165184323.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/8ed70c59dce961ec706b7b0b46acdea4/jezujaper.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/turaxevosobutagugetatet.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a437ad41be4---xipunopobirupajubupib.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/11844653354.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160860da822cb8---615335740.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/87825307962.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4f5f1d528e380fa3ea4c34afc9c2f317/53269608344.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/fivikifatitab.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/28965987850.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/duxivaxibefadikuguxi.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210813_973CFC73AEA47A3C.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/tizijuvusafedun.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/80431479025.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/9rhbr41p1usob7rium27sbb7mb/jexapon.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/pujetisiko.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/povhv9a9rs11kq0lcfa6c9l9ic/getatufoxoxuwixakosuko.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/8352279005.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/725464436ebb1ebe9e99c3735283d6ad/91045653060.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/33d3ee377d397895b098e31ebcb8bf67/lesusilobe.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/74250195769.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/22545061157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=allopathic+doctor+coursePDF 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

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_off0000da5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5C 10588 bytes
SHA-256: 9b108445cb8db2e6f3259a665d65d12e4e9757f0e424f12385d8b640f50ecaae
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD0 17964 bytes
SHA-256: 05015d3f906027620a66c1bd2f784b647e08980a4bb5d648feabd3cb72e89ff8

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