Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d73cd2bd8501cd…

MALICIOUS

PDF

97.3 KB Created: 2021-09-03 20:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f77a4c9131daf66660c4671ace40ba99 SHA-1: 8b19c270edca1322d57df4a176fcdacb9e23dacd SHA-256: 56d73cd2bd8501cd7ebfb55d252d94779ab51d3aafeff37255891ac4915faa7e
176 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially malicious URLs and prompting them to call a phone number. The document's structure and embedded links suggest an attempt to exploit user trust for financial gain or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://garglob.ru/uplcv?utm_term=panasonic+telephone+manuals+uk PDF link annotation
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/21052ca8c039515cd7ced0e072386f3e/tuzuguradafida.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a2cdbce48976e81d51de908ad87bd9e3/digakowanikokegupoj.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e558b9379db---bawakizif.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2f94ed25b---28483242950.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070725a0ecdc---femivigitibiwibu.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/sefetixuxabazoruno.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/baragazap.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9af4a4811---ropobi.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609102a2a622e---48592213635.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/49500554884.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2562c4cb1425758421ede0635cf98669/doduwupamabe.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/kt23t79rpkn2h1q8nne2fvs2dt/rikegadatani.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/dc339a62ecce761a7e2afe1351b0a61a/8299776248.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074471a50826---pojojopatujosaribedosore.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/70d8e2d21f7c29ff3007a8907986d75e/zedabiwumo.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021081111312_1015920456.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/06abca0c032d033d2fc9d727754dbced/38928998661.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/51807294b4a77abc77a4eee7397c7f21/68353574305.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/lutekowav.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083ac64698b3---67838715011.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/86e7ad1c9d7191939a50b76df1edb57e/rikof.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/gevaxewoxejugezuzamofuled.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/54626001273.pdfIn PDF document text
    • http://mayjack.com/upload/files/2081040454.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_off000115ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115ED 10732 bytes
SHA-256: ac6df66b3f9ccfce893f552003cf8ac0521ebedac980157bc720e04ada4e6a39
font_01_sfnt_off00012e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E63 18932 bytes
SHA-256: da01e1ef6c9a042ccc12e447a5de4b330bdca9abc5f0f8f275bf160769c85b50
font_02_sfnt_off00015fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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