Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eafe2056d423903…

MALICIOUS

PDF

82.5 KB Created: 2021-09-22 09:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3402cbf56a1aacc2eb8da67613826eab SHA-1: 443a61fb9a4f5336b9e2e912495787ad72de8383 SHA-256: 0eafe2056d42390357da3d869ac44f6779ffc5f5b07d487a1b0d1f9395ef7192
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a link farm with numerous distinct hosts suggests an attempt to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack, likely leveraging spearphishing as an initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://explosivedevices.ru/media/file/befuverilonevovisoradunex.pdf In PDF document text
    • http://m2m2design.com/userfiles/19461695650.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/30890065.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/tatoxe.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/tatisaliwinewabapiki.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/40459483983.pdfIn PDF document text
    • http://panova-art.com/files/file/fatemosad.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/010708165581.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/55366395013.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/sozisuz.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/birazibovejojevopusozij.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/2604982225.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210911205121.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/tojawifezuxikulogaboduxe.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/86279115027.pdfIn PDF document text
    • http://eternoohydro.com/d/files/jibejuf.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/74342898028.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/pinagutubo.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/53061202970.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/64424783024.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c0b0f843200707d9d258637e4389c12f/vivajaxebajatabixugaxugab.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tinelediwejujazijelit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+can+you+tell+if+someone+has+viewed+your+instagramPDF 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_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 11280 bytes
SHA-256: cfaecd750aa5d58a1f84c9841fae4759961cf7148685208406426468201aaa6e
font_01_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 18416 bytes
SHA-256: 9272fba35608654b8db519eae346ffca5cfbd050810d88dd9647f0e43d9cfd30
font_02_sfnt_off00012411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.