Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9dd6b1a94744f6…

MALICIOUS

PDF

93.8 KB Created: 2021-08-14 08:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: caa8971682dca59f94df4bd5376e02ff SHA-1: 93c072e08c1001d26b37345b7c36db283e236ebf SHA-256: fc9dd6b1a94744f6c5257689e7187b7af2e8d2982b93c7aa57f4b017b0c284ba
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of multiple link farms suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=what+are+the+characteristics+of+all+the+zodiac+signs PDF link annotation
    • http://terezmisszio.eu/files/file/kisifaxikek.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/84056959236.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/57115b049e8bb2b4017e8a61007b31b9/37524317384.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a6cd8d905---livobabat.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096023865764---nivosegobut.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/lowilari.pdfIn PDF document text
    • https://airbays.com/userfiles/file/73061653221.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/2021e45a74eb92e6793fd37abc1a3700/fawikiwufotelagumaruwuwu.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/59188841282.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/72138057743.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4bb6a18e5---depufesugewu.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/vudijimidasuwusudofebuzu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610484a33c77c---wexut.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798764e6cc9---terurosinuresik.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160815305aaeab---31008906902.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611705b4364e5---wejatexa.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/dagogaromapuzixe.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6b81c2bdb---rexexopakasofusunaxomitan.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/b91g9atn37g4nc2hk6tlahlr4a/77169357026.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e9a108b7---kininekezezekipawozubeji.pdfPDF link annotation
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/wazunixekenuxesufupijot.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/kefoto.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/gumomakasabuxisunalimerob.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_off00010995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10995 17040 bytes
SHA-256: 54d27be0c14862f98858064fc62c6840bc39eda8c2a45d3f927f8e3cb01f6d08
font_01_sfnt_off000135ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135ED 10808 bytes
SHA-256: 471ee1f4a6769148dad07adf61c40c0e27a116c0bacdc11657978e4462777eb9
font_02_sfnt_off00014ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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