Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2682d3dad73ac1…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 13:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dae9b8fc8ee0dd8c2c113ee89cac065a SHA-1: 8c40642cbf3df5745afd1cda50cc31a4c47c1ef8 SHA-256: cc2682d3dad73ac1dd789e84bb73ff553c3935c4270f1fd2ba2638faede20cfc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the links and the detection suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f00d67452a---73878413553.pdf In PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd7e3ba9f9---gapupuzilutadi.pdfIn PDF document text
    • https://expomediainc.com/upload/file/barofawuninesilatarogozef.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/tuwubikovixo.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f43a3475---51906627298.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/88127618219.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942da2f1a6f---nobudezabuvapoweb.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/karitalakibelet.pdfIn PDF document text
    • http://jiab.net/userData/board/file/75832385480.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/09cb9b7e504fe126f48eaca4ce42d03c/jegadewudizixesikabof.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/sesawon.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/legitopadodemuzagakog.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd968d42b---19076545350.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903f8c27320---94513970904.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d0061a0e106b5189b4cebdcef31e52aa/gojinaxakopubetu.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/5fc220298bff8aafa779f9fe10eb895d/perinu.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/poxokavitebevenujujanowo.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/fogonesimakodugijufi.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3c8f2c4d7---gomiposomol.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/36899093039.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/215820f83708961c6b25125539ad3d2e/92087145406.pdfIn PDF document text
    • https://ekaplast.site/admin/ckfinder/userfiles/files/43861828163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=jag+janani+maa+durga+aarti+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A0 10596 bytes
SHA-256: 069c2eeefb4af2f06d42459ec846c8282d1993b2f8a9e51f39858bcbde8296e4
font_01_sfnt_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 16232 bytes
SHA-256: e06ebeaa2bb94d9bf14337b0794fec2c9c4a66e30291689b6f6234bfe360c8a5
font_02_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 19104 bytes
SHA-256: f1e6fdc8d4ee120e3b70941ee4321e58dfad3e0e36c704384f686c6b9b8618e5
font_03_sfnt_off00011695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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