Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33e9cf62958dad4…

MALICIOUS

PDF

71.9 KB Created: 2021-09-19 10:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 726afa692666cf69e86e9b38f2b3d64b SHA-1: 700a2452b5b46104d5dc0edd69b0d40f137c8668 SHA-256: e33e9cf62958dad4b8ba34d98a03a082447885d8cd3413f8205f3b5bfc7fc499
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which are unknown and hosted on potentially disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically points to this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://carcable-bg.com/uploads/pictures/files/42799742242.pdf In PDF document text
    • https://shop-ecobati.com/medias/upload/files/pefabonibafubisanej.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/56723600934.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143caee733cc---17688736192.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/16805566780.pdfIn PDF document text
    • https://value.ae/userfiles/file/zekexaga.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/90201079988.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161400794b47c4---41143561444.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/65347469767.pdfIn PDF document text
    • https://premium-house.uz/images/file/wujirinabapitevunesefas.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/todanizaderagezinon.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/19859877377.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/71659318648.pdfIn PDF document text
    • http://domario.ru/userfiles/file/gutuseselub.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/dozobibaxug.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/kejoda.pdfIn PDF document text
    • http://modern-pro.ru/files/file/pelevadudokovizi.pdfIn PDF document text
    • http://centronegozi.com/public/zijanexomadewasilebejini.pdfIn PDF document text
    • http://talesma.com/E/file/netakezelalukelosiralorav.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/92726555320.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210907_CE3DA03278731481.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/novufomasanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+fix+wifi+not+working+on+androidPDF link annotation
    • 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_off0000b859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB859 10452 bytes
SHA-256: 72b6d0b6efd03eae2ebcf393b753528d937d454d2479cf9e75cd1a7ad7d27440
font_01_sfnt_off0000cffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFA 16300 bytes
SHA-256: 043f67d8cbd51565655759b629647fab9ba0b18cbf4ba067962944bb3f543ad3
font_02_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.