Malicious PDF — malware analysis report

Static analysis result for SHA-256 0865cefa8ddca341…

MALICIOUS

PDF

76.6 KB Created: 2021-09-14 21:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd3e5ec9c1a6a45ddfebb37649239b2c SHA-1: 3a938a46f9201f4c7aaf335284b174b4712b9269 SHA-256: 0865cefa8ddca341d4230bbdb3f6bfdc462b13c9e3ec64eb7262b598929ddcda
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and heuristics identified it as a link farm potentially used for SEO manipulation or to distribute further malware. No scripts were extracted, but the presence of many external links suggests the primary intent is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=screen+rotation+control+apk+download
    • http://eortak.com/img/fck_temp/file/ramepusu.pdf
    • http://educasters.co/ckfinder/userfiles/files/raxedewufotamikememu.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/sqgevi96uihl7rn7h1sa2ou8n2/litarikopapasevuzakedot.pdf
    • https://lenaoyunlar.net/calisma2/files/uploads/jemafep.pdf
    • http://assytekservizi.com/userfiles/files/15450623502.pdf
    • http://1day2night.com/UserFiles/file/65385186239.pdf
    • http://dkstores.gr/userfiles/file/xewimiguramesolagije.pdf
    • http://gpe-el.pro/ckfinder/userfiles/files/46364142115.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383fdcdc44c---jametawodaj.pdf
    • https://aluminiosarla.com/userfiles_arla/files/bowofofojup.pdf
    • https://mmszke.hu/files/file/dagupigarivabepan.pdf
    • http://haciogullari.com/depo/sayfaresim/file/73092988230.pdf
    • http://xinxinhouseware.com/uploadfile/files/88216761787.pdf
    • http://lg-palette.com/upload/files/tamupa.pdf
    • http://pazarziraat.com/userfiles/file/80659783513.pdf
    • http://gro-felix.si/uploads/bukolepuwuxepenobelom.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/tedukiput.pdf
    • https://locktactyuma.com/userfiles/file/17856807214.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161354c0c18c9b---lorevulutivunutigepi.pdf
    • https://zniczekowalczyk.com/user_images/file/83316266346.pdf
    • http://allineers.morefriendship.com/upload/files/68469896208.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ad48f0678---rapizujusopesufekoned.pdf
    • https://idosekotthonaveresegyhaz.hu/files/files/37616798400.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_off0000c935.bin
ca4b64fd7cb74d5052a915e886f1d7db3709f3303694a84a9d4cd3f67370ae74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC935 16496 bytes
font_01_sfnt_off0000f3ef.bin
0d652c6359671f299fecdba0737935b5457bfae072b75506c12db610d99bf5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 10592 bytes
font_02_sfnt_off00010c47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 16792 bytes

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