Malicious PDF — malware analysis report

Static analysis result for SHA-256 324d3c5a89353d19…

MALICIOUS

PDF

72.0 KB Created: 2021-09-06 02:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 77f6d25879829226fbd68d05db4a0a0e SHA-1: d1d13b26fff8a7f26753d8ac84cb086e7f5cd576 SHA-256: 324d3c5a89353d196470f3f1acb06307c1eba88aade36377da7cb532b1f6e841
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to potentially compromised websites or disposable hosting, characteristic of a link farm used for SEO manipulation or phishing lures. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://abwfinlay.com/uploads/files/17178206647.pdf In PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/jibipefotuvi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa7053773---96506580409.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/89811647565.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/8716119006.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a49ac619---kujogiboniros.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/84366732179.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/61104743883.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/vikinajirup.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/ledunufutaxam.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/86003301176.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/24316653695.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/pugerakati.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/tepukimagawonagin.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f45aacbd9553e36fcbaf0c2f78e12cc4/37417751041.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/jagovevadibowufupu.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/63600393312.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d665e2cd---8598873378.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/letisapasebadosugodubev.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/3vaedubhphcrg6jil4q2g9qfaq/bokeluxuxoxanoxu.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610d292657085---8757841414.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0fc79434d807d2fa82b8d27f065201a7/4704155923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=shiva+puran+pdf+in+englishPDF 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_off0000b848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB848 16124 bytes
SHA-256: 2d4b75cdbbbe3961022ba4443d5b79f05f4b2a6da9aec8ce683e693042317741
font_01_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 10800 bytes
SHA-256: 88a6c4ab806503a58e7f61c259cf0312a98c6d8cc01ac4035a1bbed28d8adb8d
font_02_sfnt_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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