Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb665e4f072474b…

MALICIOUS

PDF

77.9 KB Created: 2021-09-10 23:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: af2102137f519f13f4725bb749016e36 SHA-1: c58e610f7ab9638fd831f25d8146e8f70226239a SHA-256: 6eb665e4f072474b28a9b491d6bb650ea7ae21128ee3333eab1d54fa57de7a56
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://synerhu.ru/uplcv?utm_term=can+an+android+video+call+on+iphone PDF link annotation
    • https://seedomoretravel.com/files/files/kaguvegojulomej.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/18332294670.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/78208778864.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/51975466113.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/90190012207.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/28869736143.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/jinixuwekevuratonigepup.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/manopawibipel.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/dixej.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/nazeduz.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/91975657297.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///63413798563.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/balujeju.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/xebivezazubolilofiwowu.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/jumadan.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/45083283131.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/81213710419.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133113204214---lazuvenawuraki.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/60424874770.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/dewonurirelonek.pdfIn PDF document text
    • http://khocabien.com/uploads/files/zibazifurodurukupapujuto.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/naletapufel.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_off0000cd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 17804 bytes
SHA-256: 4bba5649672238e8304db16dc75edbb1622f86e5cc504b216fe6f5487f1678f7
font_02_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 10440 bytes
SHA-256: 9baa785d51dc7f03ad1032765bb65a5fc6156ce37253223bac94eaab6ba042c3

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