Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7b49be136ddfdf…

MALICIOUS

PDF

80.5 KB Created: 2021-09-06 10:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d0ad37faf40d613703f4f0aa3e6b2a9a SHA-1: f6310841c2732792fcc73831dfbc0f463eacdf21 SHA-256: 0f7b49be136ddfdf64000de30e59ffcac539de8add318b15cd508a47a2ea0fc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external links indicates a strong intent to redirect the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://catamma.ru/uplcv?utm_term=sabah+uykum+ahmet+batman+pdf PDF link annotation
    • http://altaprecision.com/userfiles/file/42815821589.pdfIn PDF document text
    • http://meta-min.com/files/masazurin.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/49596242ac86e2aca4658bb1c6d7f0a8/majovetog.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609506573c899---56793519802.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d78442c3eeccbf79c90d78e82c51582f/gomiwiw.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/tazuneluwatobovodibogumi.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110067830b75---66489880108.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160787cc4d19d9---29565992759.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/53308044917.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/mumexatozulofesafubu.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/280i80ehv7uk5ragih8rtmg316/nebupavixofuxopexatemodet.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/suzuxuwabis.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/koneg.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/52512883802.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a271d7bf5---40473812129.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/ddcb7141e7fcfa30061d8f9af8cdd88b/72768889790.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///numasurawazub.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/s0mu79h9qdkm295c4pohoil65o/18657332612.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/narigivunogu.pdfIn PDF document text
    • http://ed-union05.ru/files/file/6743822178.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d576880d59bf3af5a2e648fcd0cf203d/39179997366.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e92686f1ae---dojazanunuxufuz.pdfIn PDF document text
    • 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_off0000ccbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 10760 bytes
SHA-256: ed7ed0420e8f12cd67cbc18b5d4e92148048470cb37419be237387cd0cef4ffb
font_02_sfnt_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 20808 bytes
SHA-256: 6df0a69fa92614c06bb2758d2396ec6363c064c5b38e2cd383075613297e5ad5

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