Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1d30352fd49821…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 00:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61b574c14c0df1a6dcd725f55eafde79 SHA-1: 5b224c375f1c4a96831d80e2d1108d641d2a5ab3 SHA-256: 3d1d30352fd49821bc1d2f46e207dffeb2c94edaa6d36a6e7ab79633ddba5afa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85913939259.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/o3ntjjeoqvgf7r7n750vl57gpg/dulaw.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb8770de16---moterozifipunuvo.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ba0d3f5410307b0723c9a2207c59bd2a/jenavifiko.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/mp3ih34tiaenh4kh0f1m0ma241/95442454777.pdf
    • https://tkquiz.com/userfiles/file/65435899429.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9oi61ubtu4sg6cni6a61qdugb6/51607122608.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a06c7eac2---64216763528.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39182a4315---temine.pdf
    • http://waypl.pl/upload/File/suwuwovuzanegumugogonu.pdf
    • http://hrudolf.com/userfiles/zunis.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/57645b1c5f842dbbc7e00d5bf5850977/vuxixajozimiwusud.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c8aff0e43---giwopobomizavafiwuwebasez.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/fcvv8r9olavobb0a6tdln6giq0/goreseluxexix.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c412b8d1668---80380736170.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609298e5d4dbe---wiwodufawotovoxevirozij.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/lsj1vm2puj0986qhipoqqi0d2e/47578510408.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160712f7f375a0---43751285657.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8262267a7---85170204079.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54f4e5bfd---naginamidudapunoxok.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160777751ba9cc---46480104913.pdf
    • http://arniestribu.com/campannas/file/33522420995.pdf
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/5d32c6a9ca9b40a64a982ad38831b356/zedulujesejoripimixobu.pdf
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/7645175613.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/f7cd4ff5299bbc6c2fff98d1c4904866/guxekanemakololid.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+rotate+pdf+file+using+keyboard
    • 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_off0000f081.bin
189349cd447072d6befe8a7f3d98593c003f36025a9fd6e21c3d8dd3ba7999f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 17760 bytes
font_01_sfnt_off00011f63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F63 16792 bytes
font_02_sfnt_off0001377a.bin
434acb4b39671b930297b476da37f5462ae8e7a922da792caf5295e20c642851
pdf-font-stream PDF embedded font (sfnt) at offset 0x1377A 11196 bytes