Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7a61af55b6187f…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 23:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d36770cb899b1d1d08544a52c8e329ab SHA-1: 00a32d1276f7413fa8fc98b3db7d337d16ff44e6 SHA-256: eb7a61af55b6187f0c6f8d848aa924587f0ed998acb90c154d4e9991980cad12
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many of which are on disposable domains, suggesting a link farm or phishing operation. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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 https://archism.ru/uplcv?utm_term=picsart+gold+download PDF link annotation
    • http://vizugy.hu/uploads/files/59310922402.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/4424663880.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210903_8B4494676E973365.pdfIn PDF document text
    • http://52963566.com/upload/file/202109181133507179.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/pibijiwu.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/setudazelofi.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/jeporatiwemigusineruxigav.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/peziwuvi.pdfIn PDF document text
    • http://hbaoge.com/upload/files/sidorote.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614050112abc9---78561469599.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/49870368402.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/3124615904.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/dixomoreripujor.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/misisikibejuloseluluka.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/7437725815.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/mazobaxutuwixoxibimuxisu.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/59317671772.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/8d2e45488e479b9818bfdec1f29c008b/48314843886.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/58140650239.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/46915719840.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/kepuwipejekodakib.pdfIn PDF document text
    • https://atrax.hr/files/tokubafusapajijonarev.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/joxeravaladasavenapumevem.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/nunis.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/roludadegesanetaba.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/68420444940.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/33359603425.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_off0000d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 10500 bytes
SHA-256: e6807cf0e40089044743d8d63f57903d334acd96c672f46535a5cf2d2428113d
font_01_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 18316 bytes
SHA-256: 3e71e0e7f8b6b14f7bd2356f5f61ebb0be1bc032f2e9a14d4469035887dae44f
font_02_sfnt_off00011ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1