Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3f0d98d7683c92…

MALICIOUS

PDF

94.0 KB Created: 2021-09-18 22:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9004602f08a75254d98e648685325d5d SHA-1: 2f4c5fbcc3786596194bf10721e46b8f74b138bf SHA-256: 0c3f0d98d7683c922512373932e14f2b97ed6657b7a27788c4b66b323c08e444
126 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. It contains numerous embedded URLs, many pointing to potentially disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.kickcommerce.com/userfiles/file/84779131425.pdf In PDF document text
    • http://nickels.design/ckfinder/userfiles/files/33909606222.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/34124029243.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/wexefa.pdfIn PDF document text
    • http://oguraclutch.cn/uploadfile/files/39234138630.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/f0e13a4443a93302d8fa3f2413f9d7f2/18415596004.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210905_7AC3C44524BAD507.pdfIn PDF document text
    • http://bresky.cz/res/file/jovefagukupenatijovek.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/bovik.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/sawixutovuva.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/bijegulodawobusewulozun.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210901_143418.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/66436589775.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/52190561334.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/88690925013.pdfIn PDF document text
    • http://metallpress.ru/files/tumaniru.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/miwozesinivuvugifeje.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/12806677684.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/zozukurijizi.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c11007155dcfe5738a27f5497315078b/53215065944.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/vapobew.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/91122266482.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/30883448676.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/21187059632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cambiar+imei+android+chinoPDF 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_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 18080 bytes
SHA-256: 6a14a670bc2fd77d2b1752926a165df7d02ff385992eb414c481399fe1c10ff4
font_01_sfnt_off000138f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F6 10496 bytes
SHA-256: 065a24171c12a72cfbf30134c57178df80044048e9a34cd6266cb3ef8478c547
font_02_sfnt_off0001508b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1508B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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