Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0e720c93ed095d…

MALICIOUS

PDF

86.7 KB Created: 2021-08-11 21:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebeb49e8ce01dab53089b8d4bf9b252e SHA-1: b99f968041f6f96ef484d5f18a07b9913be73d8b SHA-256: cf0e720c93ed095d6b7cf12fb518bcb18cb05c6a66dff09c57809ead40b0d3c4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a specific advance-fee scam lure and a ML classifier. It contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of a visual download button reinforces the lure to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baloneacessorios.com/_upload/file///74943495126.pdf
    • https://egyptsuntours.com/userfiles/files/48286082874.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8619368e4---tuzobulod.pdf
    • http://obraz-tlt.ru/userfiles/file/45491732607.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607825232c3db---1623333848.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160afbceb67e26---vepeju.pdf
    • https://fundreamz.com/ckfinder/userfiles/files/tegib.pdf
    • https://bywuf.org/upload/editor/files/41517295725.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4f5d7284b---79246351665.pdf
    • http://laclonghotel.vn/upload/files/42150269393.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/db9fc417beb5de3355c7604b10f4aef2/28433024331.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607055d99f9d7---21623982393.pdf
    • https://virtrade.gr/userfiles_lybo/file/nirezofinilojeseziwuzow.pdf
    • https://rumusjitu.com/contents//files/lotewamamujo.pdf
    • https://angkortaxiservice.com/userfiles/file/95900046202.pdf
    • http://eastcoastbiker.de/sites/default/files/file/butefejopi.pdf
    • https://rasorestefano.it/file/rugigokokijeba.pdf
    • http://engineersclasses4competition.com/files/others/97931291266.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/8umt1gr0l1nvtdjbqgs9kkoubu/43317865183.pdf
    • http://meandnetworking.com/ckfinder/userfiles/files/23746471988.pdf
    • http://mfahk.com/upload/files/42553531987.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+the+last+date+of+b+ed+admission+in+aiou
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE08 16792 bytes
font_01_sfnt_off0001061f.bin
2b5fd7847babe6f65ebb7e6561ab86b0ad532ad418881ec361b2d9f8a34a05ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 10752 bytes
font_02_sfnt_off00011ea2.bin
c067d98cfad48afd1cd5c4576051acca942ba200d055089ba4238f39b2616b4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 17380 bytes