Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95d9335e4f09ac6…

MALICIOUS

PDF

79.3 KB Created: 2021-09-06 19:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 15b38b0325f6ef87c5e560d538d4b112 SHA-1: f5e84975c72e3cd7bab802eb341402a7d27ddc2e SHA-256: c95d9335e4f09ac6b581ebf9683e8574b96256f388756b5d6272148d16012fe1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing lure, instructing the user to contact a provided number for issues related to billing or security. The ML classifier and ClamAV detection strongly indicate malicious intent. Numerous embedded URLs point to compromised websites, likely serving as part of a link farm or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://queure.ru/uplcv?utm_term=planet+fitness+cancellation+form+pdf PDF link annotation
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16090bd25db4ad---27536881795.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/0475e0c28799dcad78f5c9a3aec8866f/26336852594.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/66402079814.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/punawupotoke.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/69289214408.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16082213e944a0---91654297388.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c3b0f0f92bf4a1027267d27f85f166d4/vigepeterabufumunod.pdfIn PDF document text
    • http://cmoretv.com/userfiles/toxuximabofirepupoxa.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083a62e3a553---288098970.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/ritixejubonutolosolefom.pdfIn PDF document text
    • https://venus-forever.com/image/files/72303781512.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/faxixadimomu.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/78404830374.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/jagiraxosawerezoxif.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/zesaviwalen.pdfIn PDF document text
    • https://famecosmica.it/file/34664965566.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/dogoxogujepu.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2007754fe---wesomigakuremekig.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/39298606695.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1d758d4d3---99069856159.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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 10780 bytes
SHA-256: abf6940bcd062e0a6dcf83237720fefcc7c78bf6de34a63fea65b2623e8262da
font_01_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 17180 bytes
SHA-256: d208ccdc5427f79e45d4e2c477e87de11237e3b279d188ba97de94f5a38f026a
font_02_sfnt_off0001176f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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