Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c78980911cb344…

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 22:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82645de2f7cfd0b95b92171eb9a78eb0 SHA-1: 001f73e69bc84c30263869ddac6664af0e88e8be SHA-256: 69c78980911cb3446beaed227d70f41542eb11a729db5be5f6c4404d8a7b0332
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URI findings suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://oniceh.ru/uplcv?utm_term=double+your+dating+pdf
    • http://dycelife.com/userfiles/file/govafijuvotedilu.pdf
    • https://jagamimpi.info/contents/files/zasova.pdf
    • http://herfon-machinery.com/images/ckfinder/files/20210916003343.pdf
    • http://fratellibeninca.com/images/file/koruliwizimafakifiletu.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/528f82d0ad51c2f205e67b752cfae864/ridanavur.pdf
    • https://tjpapigroup3.com/contents/files/44452705720.pdf
    • https://perfecthospital.org/ckfinder/userfiles/files/tetek.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef6654624a---pezasosamibagixo.pdf
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/8982689321.pdf
    • http://ediljolli.com/userfiles/files/mazoduzulemazinarebibevu.pdf
    • https://shian-jin.com/UserFiles/files/98696426754.pdf
    • http://www.civilhospitalpalampur.in/img/uploads/files/85603078102.pdf
    • https://serrechevalier-skifun.com/imagesfile/45193044806.pdf
    • http://topmebli.com/content/xuploadimages/file/62640861718.pdf
    • http://rotarycochinharbour.org/ci/userfiles/files/paputajoxodekunaluduludix.pdf
    • http://ukrfirework.com/images/file/48203793056.pdf
    • http://babyshelter.net/assets/upload/files/58387160654.pdf
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/76795128952.pdf
    • http://artechq8.com/beta/uploads/files/wekeveberujide.pdf
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/79377888863.pdf
    • https://italvaping.com/file/xoxutalikorufiwivowe.pdf
    • http://alrabbanoilandgas.com/file/files/32421280785.pdf
    • http://dycelife.com/userfiles/file/nebesiboro.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65e.bin
6b0f4a1384ce90aa837efe51d5f888f0b5553f28ea5292e2cdcf4d3fd200d7f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 18636 bytes
font_01_sfnt_off000105f3.bin
87fb73020315f4fb3bd1826aaa7adafc81cd570ee9e790b69cbb959b5071656c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 10860 bytes
font_02_sfnt_off00011eb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 16792 bytes

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