Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0e130b0670dfd5…

MALICIOUS

PDF

88.8 KB Created: 2021-06-28 21:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 374cf83142e4f46838bbab746c649d55 SHA-1: 874d2bb508fc10ba0961b192b143bcbbb9cb646d SHA-256: 1e0e130b0670dfd52398c661257bac1d29b1aa7ad63e3901b10b7bffa7421dd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristic firings and numerous URLs confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/b9avhq6iopml9p8q9vn0s6ji8d/kotutipobumukejumagogel.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/46933355ba3cc4f00b03b5ec09a615f3/67188829000.pdf
    • http://orderleesushi.com/uploads/files/tevusegadogapafulamuvu.pdf
    • http://nenkin-t.com/upload_img/ck/files/xemedi.pdf
    • https://echipamente-scule.ro/userfiles/file/rabuwebikaxil.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/4309b4b77bb1870aa1309d4d29862101/sesax.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/6314798d450deedfafcea8a7f0481d36/73714816684.pdf
    • http://alfavs.eu/userfiles/file/26906870201.pdf
    • http://interwork.sk/userfiles/file/dawidezusorosesinidur.pdf
    • http://smn69.com/clients/866038/File/sowawezosusasiji.pdf
    • http://bigpictureresources.com/userfilesbigpicture/file/10644440737.pdf
    • http://w-f-l.de/user_img/file/15179251396.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/spg7lur7f5embul4ahvbp3bbu0/94367881194.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b23bd24cfc3---27580659334.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/55d602f629cd68671815b78c407cc0ee/fabegafojuwuwop.pdf
    • https://anukulagrotech.com/userfiles/file/21660416537.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789d5377575---boboseratalufofu.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a6e6684af---96975399412.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/ed48add6c38491859ebb61b23a56e572/vifalerolebisanu.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/fc3a31c4284f5b4a020b0d645363226b/zavizapevugagapibikad.pdf
    • https://bursakaynak.com/userfiles/file/90198565494.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3a2592d96---mufuxofixedetepesar.pdf
    • https://afayl.com/userfiles/file/26620417118.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=phytochemical+screening+of+alkaloids
    • 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_off0000f2b2.bin
63cbe87a6c2084e07c52b81b15025556c052ba7a1f0208612d74dcbfcac4d728
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 19824 bytes
font_01_sfnt_off00012420.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12420 16792 bytes
font_02_sfnt_off00013c37.bin
0020815b9de910e01a8ad403b8e1a7c8fd952c4ff514861fee2c36335eef9642
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C37 11132 bytes