Malicious PDF — malware analysis report

Static analysis result for SHA-256 9462daaab371ede2…

MALICIOUS

PDF

74.1 KB Created: 2021-08-30 16:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 951cd7577a564f78ec091f78a4ba931e SHA-1: 06e43004bb98ba3901dac0d03ab0b155c920c2cd SHA-256: 9462daaab371ede21bfd62fbd5cbed2597673bfa6c100185e890bb37ba5dbcee
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pantanalmsnews.com.br/ckfinder/userfiles/files/vuteboderudoz.pdf In PDF document text
    • http://iwilldoit.ru/uploads/files/files/lakufojodijajodot.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b8e54ed5---14408121836.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/wunozisemimonit.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/siwez.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/76841730087.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ea71b3fd9---11958944766.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/93751797781.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821d620a32a---tenewotumewivadajore.pdfPDF link annotation
    • https://accesoriosalmayor.com/images/userfiles/file/bowonagap.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/wowowezenajogunot.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/1f122c40b0fb0d3f7ed46c49abd0731c/medunepupezaze.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/lojivasotenitukupara.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/gibanezazik.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d41cbfb1f8c---pafon.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/pogelesixalur.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/6ad8df3153a7e2a9eba524ab5854b80f/3851125059.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/22pnc8n2l1kk429ihl6b4ib5m7/jonanerezajuloluteziriru.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/pukopirejudizabixev.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/20696071492.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/85336682222.pdfIn PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/sowimowitas.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/92181733131.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a24b818a12ecf371826acf7398bad9b/83765062901.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e4605add1---64981852726.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=1+kwh+isPDF 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_off0000c294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC294 16544 bytes
SHA-256: d5d20e3f19eb2b65bff31b2fa982b1047d3ee67e4872d9c65940d8bc19176ac7
font_01_sfnt_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 9576 bytes
SHA-256: 2ee5a044ab56e76870632bfc626aaf5c2991bd60e40f1006ad20c960d28b3f3b
font_02_sfnt_off0001022f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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