Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02135cc9d454629…

MALICIOUS

PDF

71.0 KB Created: 2021-09-09 13:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9060b48ded549ade4c1029ac6a78728f SHA-1: 77e2234fc377633d2305d9941688e9234b472f37 SHA-256: e02135cc9d454629309123699a9b85e7ce26f227c5b7e1870f7399455efa3563
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, with one specifically pointing to a URL that appears to be a lure for downloading modified software. The presence of multiple distinct hosts and links suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 5

  • 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.
  • 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=lightroom+5.1+mod+apk+download PDF link annotation
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161397ac298297---86781525809.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109011050213318.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/33256229929.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/94120293931.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/kibaruxumebutufiwipe.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/gibimixosanumif.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/nuzobobatozekafubakodas.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/ximamumadogedemusumexose.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/d9gokqs1eutv815lk7t7pgkq4a/79183368107.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/31603187982.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/10149817704.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/neranojeduzatotigilifik.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090322134273499.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/widow.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/76374069285.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161351e804a32c---siriwo.pdfIn PDF document text
    • https://windsbs.biz/files/file/pewiguzuwifakijo.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/59986497887.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/19599032860.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/mimabilojukudegiforuzo.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2572379077.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/97043862973.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/govixukovum.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109052033073407.pdfIn PDF document text
    • http://teakdeck.pl/files/file/78969193004.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/wivugokad.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/24919319855.pdfIn PDF document text
    • http://lejuriste.ru/files/file/gewupuvejokowazole.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_off0000b74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF64 10928 bytes
SHA-256: 9a308fb53f77c08f3bf3b263f567ff6f05223e8cf12e0267a6aaee52103ebd1c
font_02_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 15020 bytes
SHA-256: ac51b49a56ffd3c00519bc667a26ea7f38fb1f146501db5a99ac708b5f9ac7cc