Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d614f677005401…

MALICIOUS

PDF

76.3 KB Created: 2021-07-15 19:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8447d7bc9191f4e5263336b232bdb4a8 SHA-1: 2bbb2ed876275a422bb73d9221941eb6b653bd50 SHA-256: 97d614f6770054016dc429719779bf619d345417d913227f1bf312deb5bd4887
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. It contains numerous links to PDF files hosted on compromised websites, suggesting an attempt to distribute malicious content or redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to deceive users into contacting fraudulent entities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e79a230a6d0---7358399196.pdf In PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1db4345e105d0cce80efd0dda9b8a812/6309564760.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078203d951eb---ketaxew.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/nikukebogonefetoturezivu.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/61032005538.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/latirugamurimu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2928dfd16---9516386846.pdfIn PDF document text
    • https://xn--faade-zra.ch/ckfinder/userfiles/files/13914520344.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97bac05c02---45257425457.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/vijifagedeba.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6797b742---47296629344.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/28033589020.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/rilolariri.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162274090281067887130.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73bafe5303---soluzabiwebebegowalabaxi.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210707_B70146F66433B79A.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/be4186634395f39ce91061a86b4298ad/27115763754.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4e4fb5caee1be222a2c6390e8066f7f7/43977769844.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/jotosadigan.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/jobilip.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd05054c352---sopunoxowaniwibopubebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=command+and+conquer+tiberian+sun+manualPDF 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_off0000c666.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC666 16792 bytes
font_01_sfnt_off0000de7d.bin
0f641731558e776a7b935ba45ee00c034174b0932fe06ea761de1c27e5211f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7D 10948 bytes
font_02_sfnt_off0000f7a3.bin
88001f786b0f586952486b790453246ecc9d3d29ce87085d9f26e5ba231aa682		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 16904 bytes

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