Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d7a7072d383a59…

MALICIOUS

PDF

83.2 KB Created: 2021-08-03 05:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 987112e81004a89b26c9d2939eee51aa SHA-1: 5b1d3284c51ed6de298ab0ad30b28bc202132a79 SHA-256: 32d7a7072d383a59495456d1ca26f32f379001b2d229e191272f393556592fe1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cnex.cc/images/blog//file/16097095709.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/8911281757.pdf
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/rabugalisa.pdf
    • http://interface-referencement.com/userfiles/file/39107805700.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d6e304f8---39305008403.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/374bc87613edf9fecb38b652f9174bb5/56829557164.pdf
    • http://www.ciesol.com/ckfinder/userfiles/files/matit.pdf
    • http://uhy-th.com/image/upload/files/sapixovi.pdf
    • http://timavoshipsupply.it/userfiles/file/31120338437.pdf
    • http://zhhyhb.com/uploadfiles/files/97974366181.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608317545cc3a---88968470577.pdf
    • http://universe-micro.com/upload/files/20210731_114921.pdf
    • http://blbr365.com/userfiles/file/1624369585.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/65d28e2130f4e193588c1d2bb59ee68f/24108620698.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161007aa41779e---merigewabul.pdf
    • http://ned.ru/uploads/files/sojexevezalonedixi.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b45d51c477b83cd91b478f40781aa22d/6742767094.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3410b490145eb09cb254d54e2b167ba0/luzibodokovafafiwuwukowe.pdf
    • http://softwarefactory.nl/images/file/53460752447.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/kbsg8ho91lkmqib41lnmlngp3p/99727117338.pdf
    • https://euinsuti.ro/app/webroot/files/userfiles/files/bokevemipap.pdf
    • http://hasici-pristroje-eshop.cz/files/file/gotuzos.pdf
    • https://amgaa.org/temp//files/pajenunadisosenuketixax.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/8otd2vfqheerb4ouignl27203v/silesurimekime.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/6045584f1c543a15695a1e265c8390c1/vimoginadepa.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/726957107bbaf8430643ca75a2f7e9d8/rigima.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=driver+para+canaima+letras+rojas+windows+10
    • 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_off0000dcc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 16792 bytes
font_01_sfnt_off0000f4dd.bin
f95bc955b54222954d68c9345268934d931487ceee5ee73275e31f8bbb9441a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 11132 bytes
font_02_sfnt_off00010ee0.bin
95e91afacaa04ef0417455bdbd2c982d14da540f8132c5e452664c4393633af8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE0 17764 bytes