Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c0c84516a50be7…

MALICIOUS

PDF

74.2 KB Created: 2021-06-25 18:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebf1ac067ccd0f06d9a7fb9718dba3f3 SHA-1: a1b552b4877e14e4fab01ec1960a2135fba53423 SHA-256: d6c0c84516a50be77ad77899f9809bd2099e0cf68540b132c3e3ac8741cad45d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to WordPress upload directories, suggesting a link farm used for phishing or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the links (e.g., promising free credit card numbers) point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://allytemp.ru/uplcv?utm_term=free+valid+credit+card+numbers+with+cvv+that+work+online
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/94b837152d8cf9a8d082af6061c73d33/xulikirezijakupo.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb50fca6f6c---25209934549.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5482d74de7e2f27c746d56f4ed243bde/66073100935.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819184ab65c---jakipiwot.pdf
    • https://szabobuszberles.hu/files/files/regomanopifupor.pdf
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/31141059641.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0bf945af55d78d652e85241c5dbea11e/rufazizoxegulujitonasejir.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29311f940---zorozamuru.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773d9ae4c00---6118079695.pdf
    • https://bataretak.com/img/files/file/kadegokuxusafujezefowiru.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/26eaa399be42ee20ddf2b5c533e34074/madalujawufeba.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609388cead660---zosuno.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a379c0d00---41325777517.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160834961a1443---24291018250.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/473cb369adbd2942d754783aec3e1500/351710098.pdf
    • https://cabsfromheathrow.com/userfiles/file/rajujexugu.pdf
    • http://telmeed.com/web/ckfinder/userfiles/files/bisenavob.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41e1a552f7---koxugibexapixararop.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/71571a8b6dbf9e6dee60a8362ceab6ba/wejivobo.pdf
    • http://botosani.ro/img/uploads/file/50527070777.pdf
    • https://htddienstverlening.nl/userfiles/file/dugusuladuxigunaninovova.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6343e6ce6---5712404430.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/49bap2spfn819ck0k6ln404ipa/nijefatanimolulamig.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf11dc7987---43190090103.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_off0000c108.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC108 16792 bytes
font_01_sfnt_off0000d91a.bin
83e31ba00a7699225312a7308e003e7e25029db5ba7081704fc3b5f503bb945b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 15636 bytes
font_02_sfnt_off0001014c.bin
074245ba1773413cc0f15c6c0481c850ecc7fbedcb9d3546014312139839e77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 11096 bytes

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