Malicious PDF — malware analysis report

Static analysis result for SHA-256 9071beae0430c184…

MALICIOUS

PDF

95.3 KB Created: 2021-09-07 12:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 33462d227fa8a565a88c45dbe6a12377 SHA-1: e02d685e2c2eaecc80da3670945d28f855cf098b SHA-256: 9071beae0430c184402a99824e8b153197be88ba468d6b7b962b9ee975512844
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of multiple links to potentially malicious content and the 'Password-protected archive handoff' heuristic suggest a phishing or malware distribution attempt.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/45c36ff762503e2686bf845621a38e8c/53774101504.pdf In PDF document text
    • http://kahounova.cz/userfiles/file/33792176744.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096477580727---19999720069.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/798d03b1ac7021c81a77038890631fd7/rebuwifevo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609464431fa11---wuxomavafogikelekas.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/masefonafa.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/26468757331.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/cef223cb39fa85a2f46b4976996e9d42/verefawuwosaxegotivi.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/14654210930.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/26367217003.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bmobqkkvu6c17ms0cf11mta09/lokeko.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/rikemapiwegewesudiduv.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/75197593881.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4424c9e89---pudesodotaxelusu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/e6f84c887d07f8e12729f6926c17d1a8/xidebabiwade.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/zebemadez.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/42899413917.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/60686877973.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6689578690.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/372f0793650eee2980f8de88eb50fa2d/fojigemozuka.pdfIn PDF document text
    • http://laserinnsbruck.com/static/pajadotedem.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/7he6c0natpg6d0fc647vqihajj/59544116024.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/99382508131.pdfIn PDF document text
    • https://shinaltd.ru/images/file/61306128701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=brushless+permanent+magnet+motor+design+pdfPDF 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_off00010d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D73 11096 bytes
SHA-256: 041cbb82ef85376a034d162b1ff931b706c66a9b0b26e076bb756956d0ab9dd0
font_01_sfnt_off000126f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F09 18396 bytes
SHA-256: b32ec17c7a4190d0a454e932c348052b8ca587f2e5ab8acffdd7897315eeeae2

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