Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30ee38442c60838…

MALICIOUS

PDF

80.0 KB Created: 2021-09-10 14:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11ca8af565b129c0605c84ac6a03e6f0 SHA-1: 8c27e6976d46e32f770897ed56715aff0aa41eb1 SHA-256: f30ee38442c608389b883760da1d7e5e255889ba07cf8c1336a248be7daf1c69
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://smidgel.ru/uplcv?utm_term=free+online+escape+games+for+android PDF link annotation
    • http://mobilenmr.com/files/files/tozakanitajakidog.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/beroguvoditufubun.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/sutorewifozexabusetaf.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/52025191403.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/64808689507.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/zurulibowanoraxasi.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136777f221c8---vumajifarezozalavate.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/fowato.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/sesokesax.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/77857633405.pdfIn PDF document text
    • https://tigapilar.com/upload/files/pofibuwirisorevelekosisop.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/sasijakojanaxewanotefemu.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133ca761e463---mavonejipedaxejidoge.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/98710054308.pdfIn PDF document text
    • http://hoachattn.com/image/files/12053324941.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210903055756.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/gukor.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/nujufizut.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/fosozofewewerubogefupawep.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/mupukolimar.pdfIn PDF document text
    • http://tabletopad.com/images/file/pakuvipipi.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/91993401335.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_off0000d554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD554 10840 bytes
SHA-256: 0eab62bdebb2248e86e5e5590eb19108d683ffd746f9c85374ddcd8d6f415d2a
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 17172 bytes
SHA-256: 875b0009192345afbbab1d8b1f7189dc82056b11671fdd2cfe154b7087b81c0b
font_02_sfnt_off00011aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1