Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e397d4dd479200…

MALICIOUS

PDF

101.9 KB Created: 2021-07-24 04:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8d410c67886dee152081f67171c8d5f2 SHA-1: 0b99a786a6ddfc98caf2ecda99d425617888b1df SHA-256: 60e397d4dd479200ce27533e3d4c35ac2a2d4c649dd3838bfc8b6c42784bdf8d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • 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://quangcongluc.com/upload/files/nupumajegijikumuz.pdf In PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/jrntasr4drqvi5o6546ika6j01/27870729483.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/kigisafowenavo.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/43989575637.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894db335db9---69225962511.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/84740747612.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160839067894b4---jamirolobumotifan.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cda5a5a3c7f---gumaxizo.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3a8116e8a---xisojawolowimevewex.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/42961352293.pdfIn PDF document text
    • http://abnicum.com/files/file/22871529050.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/90108123815.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5de04af2---fagozomanurajumemow.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/68511999179.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/65226038453.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/tisokubagazoxuvo.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b748e891---bamivami.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070b79461614---62674432540.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/30429571178.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/30679895725.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160af912a76511---50003377743.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/xujubil.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/lemobixazapir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+are+the+benefits+of+surah+waqiahPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001144d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1144D 24772 bytes
SHA-256: 2e9b59a0b5bd876a26a5e36f90f3e4fdbd10c7c06bb44aa14ade23c7e723398f
font_00_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 10728 bytes
SHA-256: 5260f0872c7106764b634654317df85d514061315db33c988507ba937be28104
font_02_sfnt_off000140cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CB 18540 bytes
SHA-256: 68c8f823828edaea1ab0797f9b1c6882b819cfbd069e9c5d2368b779e430e677
font_03_sfnt_off000170ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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