Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ecd26c9186e3c1…

MALICIOUS

PDF

88.5 KB Created: 2021-09-01 02:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6470b4fc4bd0f310c522b1be2067d12c SHA-1: 3dcb14a9330c4854d88e1f48c5905a66c58bab44 SHA-256: f0ecd26c9186e3c1e503dff93d4d6818a3f0bdfd67291bff21571f5a7c7f78a8
164 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution lure.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://fiumevivo.it/userfiles/files/kijiwipuwaparekeruteju.pdf In PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/dqc7nn3bikan6j44e7imgo3arb/17114944503.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/64341763922.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/1rccihq72tbmt5dp0ovm474s04/32071439933.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/jajupoxifosujabekofedip.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf26ce2815---daboxuti.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121c5f3af1c9---46423229549.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/34539262959.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/93640307053.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4088b0eca---71765842174.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090b72f98159---zugukoxaniriwojoxij.pdfIn PDF document text
    • https://krone-murten.ch/userfiles/files/12379999817.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607500abcfd4b---bodujafateri.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/ae84eff5bf21cc32b845b58fb07e70ac/disafesinenus.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/28624097651.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/79cb6c91f22b5cc690f4794240dbc2c2/35406675780.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160fee937bb38b---zusapi.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f07e9ea1892---tuzobo.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/d81dda2ce776986e2144563be7c29bed/93902663894.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/bamigovevabijudanisato.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/fefeb16a98a0c71f6c2dfef89789c91a/61444663374.pdfIn PDF document text
    • http://charivne.info/images/file/38913337924.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d377d648c---63790389588.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160786128b4a7a---61586980379.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/2443b8522589ff394dc8b1c383c2e6fd/59743029951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+answer+how+have+you+been+doingPDF 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_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 10976 bytes
SHA-256: 65b61d43410963e24f10c5ba7d01345ad58248c3866e71e09f2ac164e4751646
font_01_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001241b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 18132 bytes
SHA-256: 2f6ab43bc0b15aec2eb5dec133393e8c494200533810ab347cd1a79c7d9763cb

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