Malicious PDF — malware analysis report

Static analysis result for SHA-256 997e6e812db93424…

MALICIOUS

PDF

101.4 KB Created: 2021-06-30 04:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a59774e67471512f1bec43ad7cc40d6 SHA-1: b6c92889f8f587bd7586e9c1ef20e92dfc4edf6b SHA-256: 997e6e812db9342434239a772144c5f195683a5ddfd05b81a9d47b7303eb2906
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to further malicious content. The file's structure and URL distribution suggest it's designed to leverage SEO poisoning or similar tactics to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2tkaifa4n2kqqdbhf6d1c4j822/xavafinavoli.pdf
    • http://agiusfuneraldirectors.com/files/file/9388056167.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a601b75896---desut.pdf
    • https://universal4shipping.net/userfiles/file/bojuzi.pdf
    • http://ahkjt.com/upfile/file/35633855424.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b1dbdcf4---witejogajilu.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608031d51e22b---vunudafutagu.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2e569beb6---gogifozise.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d3792c95df7fcce405541c5f03dc70d8/86928574561.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609816ffea2a2---89896874466.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c829eff3---50064575239.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d63a8017e76---vavatezubiwidad.pdf
    • http://srsheicha.com/uploadfile/file/rinosorirasorulijabo.pdf
    • http://mg001.cn/upload_fck/file/2021-6-11/20210611124240783364.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/janurijaxuve.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c000815f0f9---xixifipupigiti.pdf
    • https://alshaabcoop.com/userfiles/file/31429145069.pdf
    • https://aradovan.com/userfiles/file/zofatufovuxalonurizan.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/dmdke94fk6o16eg67pp34em7mc/48623785772.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/1393b00b27eebcebe7ace75306eff74b/39069760081.pdf
    • http://mextro.de/upload/files/mubebibarokavoxapeder.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160759d1669121---28634244225.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160cd421f4a2cd---sigeroxezufijapumup.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2f39d5819b9ef5fcd33f27d65df7f3ad/kuzegibobesud.pdf
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/zogovutebime.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=simplify+the+square+root+of+85
    • 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_off00012628.bin
66066945f4ea2106606056b6633a02eb0c6984893a599caab55ee5d9d146f397
pdf-font-stream PDF embedded font (sfnt) at offset 0x12628 17708 bytes
font_01_sfnt_off0001542d.bin
238afa84ad04d73167059afc4e2cb6eeaf544c16d973321f9970042389fb0186
pdf-font-stream PDF embedded font (sfnt) at offset 0x1542D 11296 bytes
font_02_sfnt_off00016ec6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC6 16792 bytes