Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6276dccd0d544c…

MALICIOUS

PDF

83.4 KB Created: 2021-07-25 11:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bcc2389f8e67636bb04d0f2ff1c99f69 SHA-1: 07db5394991332dc09ea0619bac08f5282847005 SHA-256: 7b6276dccd0d544ccb66f25bde64837384f50e4ad4da9ac740ff81a07c8e5bcc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, suggesting a link farm designed to host or redirect to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/f3jj3ca1nc21gmpuid3hc45icu/29911242894.pdf In PDF document text
    • https://blugarden.eu/file/1297948763.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a5f3e25c8---89660463018.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/76263681463.pdfIn PDF document text
    • http://kaies.cn/upfiles/21060104485059848803nl6n.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160714746c0b8d---jilevif.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607622deda8a8---88553162922.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/4maruuc8p4mtkeljo1fggl77n1/13247190496.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/1477072639.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/234103869.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/16383711500.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/916bb473a4396c2150f11cfa9df41b28/24107652159.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/50349996448.pdfIn PDF document text
    • http://akssert.com/userfiles/files/jebowojujekeze.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/sivubenikig.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc07577c6d---92997335795.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/3d9c7561df6baa1017421495e838c8cd/puvajiketakebevutogedi.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/35343146678.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/dagoxudagis.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6971d58eb---88078063640.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/egbou1omha35tdcbbpk1mgq024/nudiz.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba47e6d4c4f---97061423754.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/138d93be54654efe01d70762b144d6bb/bekadizutizateralava.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/75b22d999dcc9501e8ae08cec41b57cd/mokusumaf.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/43412467310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=expresiones+que+jerarquizan+la+informacion+la+razon+mas+importante+otra+razon+por+la+quePDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 11160 bytes
SHA-256: cf430b7ffc92423590b377fb3424372d46c238c1d12a402e9f0425185e9f9ea6
font_01_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 17688 bytes
SHA-256: f6665e059c9300276cedbe2131f5b46777ebb3f072c7f4ace5a3dfd5f12c9fa5
font_02_sfnt_off000123bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1