Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ca65ce54244084…

MALICIOUS

PDF

79.3 KB Created: 2021-06-28 23:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21292bfee373f7f86687d5e1220b38a3 SHA-1: 31240aedb846ab654dca0849c4474a5d02cce31b SHA-256: 29ca65ce5424408493d6f395dac3c726322bfc727cd2bf39591912f3c3a15cca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL analysis point to a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://7tec.ru/userfiles/files/rupodamelotaxizorubuwus.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f11e4747a7---91709859811.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085241052774---tipezujirap.pdf
    • http://alexlunacoach.com/img/editor/file/32328923415.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9isr4uitgmud5a2kam8qlt6m2g/memijifonapo.pdf
    • http://musorcentrum.hu/files/article/file/25774442093.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/ce609e0a8275907681911952493af184/jafekovativov.pdf
    • http://indovinandoilmondo.it/themes/userfiles//files/panijamusikagewunukupamu.pdf
    • http://falerisztika.hu/tmp/40318490107.pdf
    • https://wecareprogram.org/images/file/leragezobo.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160834d38735e8---73999169879.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/3f6b4f85b5f3f7f5f2936326e42963c9/mexoragosazajis.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c470638efb5---paloxabipupowusudo.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1db1702e2---6746289314.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/fd0e4106f8a22f9b86c1a1ed42bb4c76/1983033468.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2c15eff1d---92166337638.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d80a56a7c---lokutidivolabuman.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/pevc34chmha6giucvua7drber3/32313156836.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/b40l7p5s2v845kir2930iudte5/26114531325.pdf
    • http://kingtonkatsu.com/uploads/files/wuporofazetinaj.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b658f292a---1505581102.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/31b7a64e7e51b8cfe44ba4370fd47329/zigejonovuxibe.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/592640796.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/e675728109a42f8eeff9af5e40909bae/30516601017.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tanakh+in+english+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_off0000d531.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 16792 bytes
font_01_sfnt_off0000ed43.bin
702e2d1f38f3f5be3a2a9ecfbd42d78ed151a4d426fb8e174ecd7245b8024dd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 16724 bytes
font_02_sfnt_off0001184c.bin
4389d3aaa01c58f23b206d3feae2f959d7b9956649cb57fc2b7c83ea28f1efc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1184C 10512 bytes