Malicious PDF — malware analysis report

Static analysis result for SHA-256 394e8e0c351a1806…

MALICIOUS

PDF

86.1 KB Created: 2021-07-17 12:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 985a2657024c2bb5b0dc4bf7a5a15417 SHA-1: 764e8e4310ac4e5f85373f75f2d160523ba85e8a SHA-256: 394e8e0c351a18068e13e979ae9e1543a861b22b7941cdb13a889c90a18da63b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing pages or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://tcurryproperties.com/konadnew/userfiles/file/11992404715.pdf In PDF document text
    • http://allasclub.com/campannas/file/47428461103.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54c4a11da5---90100909218.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/9ebe2422ce5149ce32e9fb0df45b90d0/xovirode.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/68238613893.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/73566175908.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/46273476682.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ededf922---rolosetaxugofetap.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/baxisipibufewi.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f6a11e936907ec3ae0bcee005551301e/zokedobakul.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c485ede615227fc951b81721abe93196/letarozutirazixut.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/wenokivesezu.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/gized.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/70854507612.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b24a5032---wigisudifepogo.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aad78c17758---sizadatonovivonos.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///wofepusibexuzizemof.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/sexibiramarotabap.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/vh3kufson6qrolq56jn3it19al/jimivenas.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/d8b07d94be8af21e693c53e81c6cd7f0/45388847192.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/mcd4jk9d6gfoa06csrv0upu1se/fibulonomuwofa.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/209092dc04d54f4cede216b8fab19ceb/lamokatamizigowunuge.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/94897632537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ecological+farming+pros+and+consPDF 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

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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 16972 bytes
SHA-256: ee7056ae73ee30325f2a61f4fea5a9bd569f568d97c51c252b6916f8e4e3dd1c
font_01_sfnt_off00011aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAA 10716 bytes
SHA-256: 9e5c9cc7095b3b115f6dac1e7d826fe6105dd348365c8d8bc3deeab26f57a632
font_02_sfnt_off000132fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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