Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fed9ac02f868b22…

MALICIOUS

PDF

70.5 KB Created: 2021-09-17 13:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d6f799b0ba70b21b71ef84204516c31e SHA-1: e9b7635c93d073dd9c3c66c1d29228eec789d948 SHA-256: 9fed9ac02f868b22c14e61c6f3715c9dd627960a2244a5a593d72c7ff13efb7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to various PDF files hosted on different domains. The presence of a Google feedproxy URL with 'jumanji apk download' in its path suggests a lure for users seeking software, likely leading to malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://belean.pl/userfiles/file/lejubivipelajakato.pdf In PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/35685636525.pdfIn PDF document text
    • http://msiutilities.biz/documents/jobitegi.pdfIn PDF document text
    • http://teplospectr.ru/images/files/2654210820.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/firoladokozidasem.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/kuxubibikududa.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/xudukatewopemirisuxanubag.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/20569443346.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/gigebugibonosop.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/lopepizuvabofevapozoda.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/gakijarudimigilasat.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/25782867487.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/94430856737.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2f08d457---mijexedupexep.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/ravezogoluwopuvaxo.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a6b5630f03563d89ecbfc4040be1248f/lufigugoja.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/43173171891.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210912025029.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/21920870649.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/490145699.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/zagunodewufilu.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/fikipudivukutetipazal.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/defaxisirupukaxutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=jumanji+apk+downloadPDF 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_off0000b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 10452 bytes
SHA-256: 0c36ba403c6aa75098b2c1242cb260f0a46c3c96c8336e7f20097b37661ef04c
font_01_sfnt_off0000c90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11E 17400 bytes
SHA-256: 69e20588ac22a2f19fcfe4461fdc6fc04f2275afbc6c1e0adad538ffa370e415