Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7089513e54279c…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 19:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2804fc6c641f353a9375e953556f1e1 SHA-1: f69477125191ca172f0b61e9d6cfd7e5f50a52fe SHA-256: 9b7089513e54279c14950987a490a8d87ffcb70399d8b56413953bda5ebdb89c
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 an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to compromised WordPress sites, likely intended to lure users into clicking through to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of numerous links to potentially compromised domains strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b7692c8f32ce9de2317caac460d159a7/19018180210.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/5144d68dd1269254a4dd69eb53934e81/biselevedaj.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e16894d71266767bd8513fae3b17cf7f/43624963340.pdf
    • http://ristoranteibucanieri.it/userfiles/files/sinabavatuwuwilitodija.pdf
    • https://nationalshield-uae.com/userfiles/files/2764307036.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d0185f29f8f795b070bb2c5c8c05da6e/47553808680.pdf
    • http://fedime.org/imagenes/jumixuv.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/87256010445.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/e7rk7moc2tvli1sis2jte3419i/52736617139.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/99d81ce6587a58be777dfab55dc2966d/6480543855.pdf
    • http://jtour.vn/userfiles/file/zemefa.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bf46f3060---21043563176.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d356f5666842c9c2d73beae4e7a106a0/gonaxosudewivag.pdf
    • https://xo-sound.ru/userfiles/file/96763642590.pdf
    • http://boathousebrokerage.com/userfiles/file/87358821965.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/796baf968e1befddfe027cc61a30d656/37703851206.pdf
    • https://travelstore.tn/userfiles/file/nunesupopazelo.pdf
    • http://notar-frings.de/userfiles/file/dawoxubonavopum.pdf
    • https://ajitcoatings.com/uploads/4520618765.pdf
    • http://usdcp.jp/user_data/userfiles/files/pukejuropijikos.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/15e13002c86fbb50f35a826aecd2f41a/todelusejanam.pdf
    • http://baominhlabors.com/upload/files/90732159351.pdf
    • https://hondamienbac.vn/userfiles/file/wagal.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=valse+d%27amelie+sheet+music+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_off0000e12c.bin
91a9581f687f70ecf97708365a70651b7b3211d1d08f4a731c530b4a5318d87c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 20168 bytes
font_01_sfnt_off000115b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 16792 bytes
font_02_sfnt_off00012dd0.bin
5a6dc67f99a193cb8eb0e7537aba3a2aeefee0cd1cab0250bf143d6b705b373e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD0 10664 bytes