Malicious PDF — malware analysis report

Static analysis result for SHA-256 32028aaf0bc672ff…

MALICIOUS

PDF

81.3 KB Created: 2021-09-09 03:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d4c52e7518c68a078f090de8846fb0f0 SHA-1: fdf546e74e763bd8d28e9b71236f2836172d4228 SHA-256: 32028aaf0bc672ffbc847099a1ff4177b65dea7aff56eb29520163311781ead8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown URLs suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jetaime-shop.com/files/dovotamipilog.pdf In PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/53521628997.pdfIn PDF document text
    • https://theipbuzz.com/images/file/dodamexeguwev.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/baxetexinoxesiwepu.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/85198332632.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/girafifebu.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/gexokek.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/20908762208.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134986faf3a1---jivabolonesefonofuniligid.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/zabozuvibaluraxudukixaroz.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/2293841271.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/ragunejuwikesez.pdfIn PDF document text
    • http://chenruichem.com/upload/files/levamefapinefemipo.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/zimusavavupun.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210908083534.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/84872761991.pdfIn PDF document text
    • http://columb-sklep.pl/userfiles/file/siber.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/limodilajirav.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/wijafaxotapijunidukolewom.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/10226699716.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/nokepoderarejovobevadinaw.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/67820827804.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/dewibojenetopokusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=acer+a500+android+tabletPDF 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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 17256 bytes
SHA-256: 4a914771ae21c04e93c369e95d4a227950af683f7e79d8c3f9f6d29500aac180
font_01_sfnt_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 10572 bytes
SHA-256: 41c3438bc491101ec7bd58e1a6bd5a32ed2027466c687d3c0db5f38d90954a96
font_02_sfnt_off00012028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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