Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2decac68feb2d1…

MALICIOUS

PDF

77.2 KB Created: 2021-09-03 15:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a6bff49497d3cc66b85efeacafb9ac4a SHA-1: abc355fb53a9c2bc3082278e0fd19a050a3e6658 SHA-256: 0f2decac68feb2d1af3901d6676894c22b5bc47d58e1ddb4112b5941029484a2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or trojan payload. Although no scripts were directly extracted, the structure and URL patterns are consistent with a phishing campaign that leverages embedded links to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16093b02079399---bisozutigegadi.pdf In PDF document text
    • https://o-dance.com/upload/files/sinujovonev.pdfIn PDF document text
    • http://iwaandccareunion.com/clients/57137/File/migajufogupopakure.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/wozugonezefovo.pdfIn PDF document text
    • http://mldinsaat.com/image/files/zopuzipak.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/23911893905.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a245690b5b9---89069527734.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/vakipibo.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608233d5c98e8---57949984534.pdfPDF link annotation
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c9ba235e77---92044715817.pdfIn PDF document text
    • http://cwesp.biz/upload/file/15867866915.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/72465093837.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/72272855121.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecdf050597---92693396173.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d05e488da---83745485932.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/la6qgb5rjue6hf2g20dtg3a2kr/gufikizibasiwezobaw.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/94125255405.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/nozodir.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/68974722017.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/jamisolugo.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/bepivipinogelanes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=april+2019+current+affairs+in+tamil+pdf+downloadPDF 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_off0000bd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD79 11408 bytes
SHA-256: e1915b55f586e87098766f8b662d1c523976ebe7873e93bbd6ded4f27588c3ed
font_01_sfnt_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 21960 bytes
SHA-256: d180395d9bcbd33f5fe785055453feac4e75d0e331492d50c4dae54ebf9a9342

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