Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6aafe0feba2fd5f…

MALICIOUS

PDF

87.9 KB Created: 2021-09-08 13:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a42883d2048525fbb8d7220a00e440d2 SHA-1: 62a7c907fec52743b200a349f13e90d68a88f7c3 SHA-256: e6aafe0feba2fd5fc1621f31b391dee9ec29388215639d110e5bca35c417ff4b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=operations+manual+starfinder+pdf PDF link annotation
    • http://bettynblue.com/upload/fck_img/20210901/file/95789499918.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/32103823949.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161387947a24a8---runopotimon.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/sijizifogomelok.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/zurulezinipevol.pdfIn PDF document text
    • http://gro-felix.si/uploads/luzeteretu.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/gutoropapozewuvati.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/33124475530.pdfIn PDF document text
    • https://linker.tw/files/lereniwudajidup.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/58527355483.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/metob.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83723491127.pdfIn PDF document text
    • http://hosteleriayvending.com/ckfinder/userfiles/files/mamutitonoxugimibej.pdfIn PDF document text
    • http://builderall.info/userfiles/file/86298981439.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/92684864762.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/fuzatifuladazakomerokufen.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/8176282457.pdfIn PDF document text
    • http://plise.org/userfiles/file/lixipunuvile.pdfIn PDF document text
    • https://shunnasato.com/14097604983.pdfIn PDF document text
    • https://ibericadearmerias.com/file/vijisupiwufa.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/27625092197.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/96998463697.pdfIn PDF document text
    • http://momsystem.ru/public/file/gudanasurawixu.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/81323613387.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 10784 bytes
SHA-256: 8cb31c4791abb0060c43decbd4e8eb16f426492e7bfcdc4aaaae718d7070b537
font_02_sfnt_off0001212d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212D 19256 bytes
SHA-256: e9b680b37e025b162f8683fef544fed3f0ac663b6249f79919540be03c4f3ef3

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