Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcb2ab96fd95a21…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 19:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b0de37a0ecb058a0b817772b04f15e6 SHA-1: 0be32558fac93f1e349eaa1e58993a3ed39a1c43 SHA-256: ddcb2ab96fd95a212651e1d4486844e83a4ae12b4672c9602068644febb8243d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=almost+the+entire+mass+of+an+atom+is+concentrated+in+the
    • http://alexlunacoach.com/img/editor/file/93331127846.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbdb8c5297---73914700305.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b964348da---pekutalejesojuzibozetabup.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/gsc4amem73ournqs20bm5luu75/gufon.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/b1af2fb9465ad1278d43a429232a078e/mejunufagujarimudoju.pdf
    • http://2990592.ru/ckfinder/userfiles/files/narubaxokexatogow.pdf
    • http://techbis.pl/files/file/noveforikujalita.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d6278c8fb---18820429194.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/l3ucf2i2s3aiu4r73pt6it08mm/25942958072.pdf
    • http://zoop-tech.com/ckfinder/userfiles/files/5456312025.pdf
    • http://shipagents.nl/uploadfiles/file/borasakufas.pdf
    • http://associatedreclaimed.com/userfiles/files/segoboxolux.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750af325984---lizesabitibomobemapijojon.pdf
    • http://soft-pro.hr/upload/datoteke/30689077013.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ks5pt73anhb46sefm4k0rcqj2b/9331281176.pdf
    • http://all-pass.com/folder/editor/file/92372437920.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2b7307c62---18851092467.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f05f5085a1e40c17364bb49aa87288fc/wusozepoxeganaw.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/vuvek.pdf
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/33889625490.pdf
    • http://bona-agra.pl/Upload/file/70030279251.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/df22dbcb18b4cc8b8f6d011683d09cec/11555818062.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca786b3b3---93079565147.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_off0000ea1a.bin
4d52ab0cbd8050157ec15b34873d8605090699bae95e8a3b8d1468579352ff0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 17404 bytes
font_01_sfnt_off000117fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117FC 16792 bytes
font_02_sfnt_off00013013.bin
4960606e8aa39a0e27af67d542aa4ea31864ba49a72775d589b2fd67ed16d2fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x13013 10720 bytes