Malicious PDF — malware analysis report

Static analysis result for SHA-256 5720d9369aebbb65…

MALICIOUS

PDF

78.8 KB Created: 2021-08-26 01:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c47dd51c347bdc0be27a5b00e158af10 SHA-1: 3ba3563ec834ecf490986096daefa3e432162641 SHA-256: 5720d9369aebbb6597cd5c2bfd0737c50578b53696818b4ff7c5ce4d8b745385
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=all+levels+of+cannons+in+clash+of+clans PDF link annotation
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba6190db4---91345976414.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c9d4c8a81---14946182929.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/bifuviliwuwasezap.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740d57469b6---xugajubegagajujawu.pdfPDF link annotation
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/14787573356.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/36405556687.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/fjne21a1i9mlb4cqugpqt935ij/2789440626.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/tunubomefokelidiwon.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/7pdnlegccetfg0v106r7qa3aun/xebibuzepiragifujem.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/71838746499.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/88b2be7267037881289d1735f9a0ba41/linirarepudoronelu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8lj0lqu3gv13sa8tdmtnmu46c7/wolifaza.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b858619e73d---viguxefej.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/qvod2kgho716ghop2t46ebdiih/zamukavivedulogapu.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/15966194392.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/26015753099.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/vizonu.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/18775842342.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7bb3a68bd---34039710781.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/butujunab.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/53875443484.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/nfu0j1u12kmi3cn4p5u042mu66/59190008801.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a5dd2e1d83e2ee06e8f611dc866dbec7/fukedogisazo.pdfIn PDF document text
    • http://truthtube.com/UserFiles/file/67839008674.pdfIn PDF document text
    • 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_off0000d097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD097 17344 bytes
SHA-256: bf2979f3cee8476b250c75fdf0d30d557afa2751c4689ed489d29b92b716ac08
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 10284 bytes
SHA-256: a80e4f34da2aef10b0557353efbdbf3a78af2d9460fa0a2a38bcb1fdf0ca7d5f
font_02_sfnt_off0001148e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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