Malicious PDF — malware analysis report

Static analysis result for SHA-256 62969035ac653eba…

MALICIOUS

PDF

83.5 KB Created: 2021-09-15 15:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 495a70d63b48aed51bcd20ea26948ad2 SHA-1: 8bb8a9457a3b34d03e51b28793eda1c25c8cffa4 SHA-256: 62969035ac653eba9780ae57170e5d80309d3a637c0fb5badce718520ad477fc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript likely facilitating the download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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=iptv+smarters+cast+to+tv PDF link annotation
    • http://pengyou-english.com/FileData/ckfinder/files/20210901_68CF725F591E8709.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/68451794203.pdfIn PDF document text
    • http://uhorder.com/upload/files/48438678002.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/47080454835.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/71269757504.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/80553776785.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/91355375002.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/73594078900.pdfIn PDF document text
    • http://sissonne.hu/editor_up/77406383944.pdfIn PDF document text
    • http://chayka-svg.ru/files/15714026192.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8smahhiu6tcpiid96m69foj581/22217540960.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/roxowolivipujivar.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/botepomibizi.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/65896226921.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/13432645671.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/15421319008.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/50572111857.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/13361258648.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/88220515021.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/kadifokegeduratigepome.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/34063670474.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/jugogofagarirofigiban.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/pevosedixoradojitu.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/kujuwokifalaguxotiletatuw.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/wesimozilimabenekibesap.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://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_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 10308 bytes
SHA-256: 6882c2b8234dc817e8f93bb84bca65ded57f4bca511608b34a8a17ed41b78486
font_02_sfnt_off0001155f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 18392 bytes
SHA-256: 8b0f78f18ec71884aa2c1418f03087ae42d4b48431250f03cc3403922201be6c

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