Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b094423e47ca2f8…

MALICIOUS

PDF

88.9 KB Created: 2021-07-01 16:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9a885686b2e648ff5dd1b7f54bd5c85a SHA-1: 19af451510172f2e25b15cccfd9ca86367515a27 SHA-256: 2b094423e47ca2f8e10a33ddb4968739564a0badc99027a8f60ee21830023e06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=the+movie+unhinged PDF link annotation
    • https://chaletsuenodesol.de/files/34323745503.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/56508884109.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/ditisojixudewago.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/4dda8d120232c30a45702c6ec30a2bbc/16879438957.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/81e8f16bec4bed23d46d2b53196aaa23/95822911946.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0e33fc98fdcf83b2b9fc075b22391f5c/2599067235.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/f93e7a5fa07e25d119f2f0115874f823/sewisifusijaru.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0b7b287fe---rovunowuj.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d909aceb7f6---zududobananosokifuriv.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/af06e37acc60c39214e96f966b53c10c/64160357264.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/98153378816.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c2f7be740fba86dda2c6276fd163418c/darotunuzib.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/24af71645a2136c79ccc0b45ae632d97/gojefarenonukezatasivirij.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cadfe9e7d---348935119.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/bemisatokirupiwiziwaf.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/t76vpedatk0b46mojp33r9j6f2/vexivakifa.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a535ea415ca---51954973805.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01dc0a7af---petalinasixoze.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/57420315313.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bef93a50ac3---wexoxidokufabu.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/gojaxodebeguvadin.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/kisivivavewisifori.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/sobewemezerafafosofetepid.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 17332 bytes
SHA-256: 2e227002bdbcc75efc1bf6a030748e3525dac20437758722731c72f3c44a3146
font_01_sfnt_off000128eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14102 10248 bytes
SHA-256: 9d8bcac4816c7a808a356a81320063271de880fac21bb6e5cedc0b4c4d6f02ff

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