Malicious PDF — malware analysis report

Static analysis result for SHA-256 06eba760cf535e4c…

MALICIOUS

PDF

88.4 KB Created: 2021-09-15 16:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7c1f243c4a46a5fbfa611d22db957b7 SHA-1: 7edfd4e367803828b28bdeb97d042d262e7cc31d SHA-256: 06eba760cf535e4c7b9da545304539621fe362fb82c3d993ce7736a70c8d7652
134 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and external URIs. The PDF contains numerous links pointing to disposable domains, suggesting a link farm used for phishing or distributing further malicious content. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=le+petit+prince+read+online PDF link annotation
    • http://baominhlabors.com/upload/files/roletunujixemanosilurune.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/20440325386.pdfIn PDF document text
    • https://equinox-e.com/upload/files/fumumofasizelitoz.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/22895560111.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/xoburelegiri.pdfIn PDF document text
    • https://zzwgjx.com/d/files/71960926680.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/36683567495.pdfIn PDF document text
    • http://hybsch.it/upload/file/zojoxanule.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410de2dbc2d---41793217782.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/putanomonefojosuni.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20219132316404257.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/vipixanupovitexafen.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/45584000983.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/falewopijukunogokarovijal.pdfIn PDF document text
    • https://beaszemin.com/files/79179724186.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/80061688120.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/rizirofusajuga.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/22365434651.pdfIn PDF document text
    • https://sharenkon.com/files/gojuvepuwasofi.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/tisunugamolazufotobotubol.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/lezizuxageguxa.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/wabux.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7bd991ae620a8ee424cc05760306ff3f/xivinamuno.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/xudusavubo.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/86699375674.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_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 10296 bytes
SHA-256: b3745fbdfeb173b13ad572c94b9bbb33d1328dd7f9abced4b0fd77cefade5121
font_01_sfnt_off00010e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5C 17348 bytes
SHA-256: d22f14eff1326d282fe11a6ab0cc0b0882eda40660678aac40725c9b698e7a35
font_02_sfnt_off00013b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1