Malicious PDF — malware analysis report

Static analysis result for SHA-256 60965eb09651ce9a…

MALICIOUS

PDF

96.5 KB Created: 2021-08-01 19:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d74d4ddd5185b75512affc4615279c71 SHA-1: 78e202a6e237d3bca7cdcc8a1c1f8550d2d9c37c SHA-256: 60965eb09651ce9af05d980249e41ae33bbdd5615b7f3d76390020ec8d5dd7d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is being distributed through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tuderprogettazione.it/userfiles/files/dipefip.pdf In PDF document text
    • http://msslink.ru/userfiles/files/vijineba.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/lujutus.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/88081559859.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/52498366498.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160eca723b6a40---90114623163.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607472fc98be8---xalozapepa.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/1784617477.pdfIn PDF document text
    • http://wenxuezj.com/images/File/17038504235.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c6c6b390435d27c30271d8c56d07ae14/94204341707.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7e1aefd1e---82169858758.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9c630e203---37737643691.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/liloboluvobiwarosogomu.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/f8qngsif874gnngsrsaqi7hi7m/41434287310.pdfIn PDF document text
    • http://farmina.ru/uploads/files/25493762584.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607b12972df60---70568432799.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/4999512282.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/4bbd60a526671bf3e9533eb986e3212c/11083400090.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/28691594855.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160835eb87b071---bipulep.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a3741ed38---20480029187.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607230515634e---jonopimozudoxaturiliji.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f245da5da---xisuverolaloretew.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/h7rtgh14tip007aur5aq6h89k2/10127063135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=aircraft+engine+ignition+system+pdfPDF 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_off00011283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11283 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9A 11012 bytes
SHA-256: 7803239a10a396eef940d7b91ede1de8f9a47e91b5f3e3edf7603719d3ab91e7
font_02_sfnt_off0001440d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440D 17988 bytes
SHA-256: 7c92f73c9fd86eda19a5f45e53a631e8c445f21020f724115b9e7166e93af230

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