Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fe797bfe568aa2…

MALICIOUS

PDF

82.7 KB Created: 2021-08-21 00:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6220b67979584fe9abaf3d1acb44c0ec SHA-1: bc2e18eba5ff3c159ef968e1ba15fb1f86fddb3b SHA-256: 42fe797bfe568aa2cc2f2152ed0a9ed3d5c9fcd946f24c9de55e01cf1e639c35
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to drive traffic to malicious sites. The embedded JavaScript likely facilitates the redirection or further malicious activity.

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
  • 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 https://ketchas.ru/uplcv?utm_term=ice+age+5+tamil+dubbed+movie+download+in+tamilrockers PDF link annotation
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3305442e1b---vaxukejizafatamexeko.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/601dd1568c1456164fa2fea17f5aa5b9/xisarokun.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/5119462b9bc6eac7240d020e534e774e/vavekoj.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611381ca1a035---numurefip.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55ddcf2fa---96760355072.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4689d5cd2---penapovemoriroza.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608be353e02ee---62178641061.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/59060847774.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0417bfa77---73570327987.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/4022737079.pdfIn PDF document text
    • http://cabini.it/userfiles/files/pojejexoxalajakitukevojo.pdfIn PDF document text
    • http://ridendo.cz/files/file/lekapumaka.pdfIn PDF document text
    • http://balone.net/_upload/file///77464472953.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/kogarawuxesesurovurabawom.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/viej40etc04inmjmorsh196v10/nuzefopataz.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/61848045124.pdfIn PDF document text
    • https://quaint-house.com/images/blog//file/78734349208.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/jiwixokig.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/f16f5f0faf1e94451360118119cd37c2/15311643419.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/61604754073.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/punasarepidimov.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/beduwutoxevevexiwovesivu.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/zarigalukoxip.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62211afac---45980638849.pdfIn PDF document text
    • http://picfs.com/1b4z4nIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58F 11284 bytes
SHA-256: c4cfd739cce73f2c45d1caa0343c406c05bd599922855434480618a86859cf87
font_01_sfnt_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 19512 bytes
SHA-256: 35420d46e93edc47436fc53f7b7071818535f0684d7658184f7762bee6145133