Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5020194f8456346…

MALICIOUS

PDF

82.1 KB Created: 2021-09-15 16:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1a5f34a25d76c7be0e6127f43c2de096 SHA-1: 74227320d90009e6dd03ada243a8a322227226fb SHA-256: e5020194f845634644724a1a87c244af2b54b8f2a98c61c254b6c2177b15cc46
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on potentially disposable domains, indicating a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://myshalewell.com/userfiles/file/dexudadirufenibu.pdf In PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/tewametuzosuwiteke.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/divojamanazijeraxunena.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/pafawiru.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/bufelemovuxujepepamam.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/51191127815.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/nefefunujigided.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/negogugogusisobejag.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/25275983934.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/kotoliti.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/bupofawopilaforo.pdfIn PDF document text
    • https://mentormedya.com/files/rovavodo.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/jamunovizubavidufu.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/boliluku.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/32678977207.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210901155023.pdfIn PDF document text
    • http://kahasat.cz/data/file/18458209105.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/dakosonibobajalezusuzepu.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/dumosofaleduget.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/48421362287.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210904_8DCCDA3675CD86E3.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/88058021795.pdfIn PDF document text
    • https://sanagustin.cl/files/togola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mi+k20+pro+android+versionPDF 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_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 18316 bytes
SHA-256: c1b79cc3f06b7d14520eb6aa1af02700e7b285dfbd20b96066f7f5bf4a1c7251
font_01_sfnt_off00010a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12237 10636 bytes
SHA-256: 51cfa097d8df43589319d029849ef63be5f7fcbbe4a6040c9b2031795305574d

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