Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cebe1c6f81fb00…

MALICIOUS

PDF

70.4 KB Created: 2021-06-07 13:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c2a46d5272bdcf50f8c71397c8064867 SHA-1: 6bb2686cc93ced91a6bcd347d9406bbc1f94f484 SHA-256: 13cebe1c6f81fb009f33a038c8b1c66593c07166659ec24a45d483b323e9dad3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute further malicious content. The presence of a URL with a 'spider man homecoming in hindi filmyhit' term implies a lure to attract users interested in movie downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ketchas.ru/uplcv?utm_term=spider+man+homecoming+in+hindi+filmyhit PDF link annotation
    • http://bhhangkhong.com/upload/images/files/rukitikusaluzabuza.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8ead54224---91522448817.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/namenubuvojozuko.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ok4ju9oja160hbrd6n9l2i7dog/wisejuvomex.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3680c3b4c---46470967169.pdfIn PDF document text
    • http://edgecs.net/documents/megidofalesunuxiwuv.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2510f579---dubozutipurudizeziwivete.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210518081400.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6583f1ec3---4104579939.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/061ac0943cb136a727a63e98cef90101/nuripeturanogemi.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3cdcac70f2402b08b4ab9404cbb3e0ef/bakamaxaje.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210606_124836.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/4gphc1jj8mhm1n8vde58fckcp6/tefunonowutala.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/77932577948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EE 5596 bytes
SHA-256: f3a062fdc74ce9bd15e466788a17a776c9e86195dd921d04f7a5c0e2b3187370
font_01_sfnt_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 11176 bytes
SHA-256: ddbe922e331ab25661080395f113e29718a966f178309d490590a022b8f1453d

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