Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3251883dff4363…

MALICIOUS

PDF

83.8 KB Created: 2021-09-09 09:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 265bf9b5f3c711dc2b0d9545f01bc2a7 SHA-1: 679c52f335b638ba07586bf54bfebdfccf74b636 SHA-256: ee3251883dff43636258c57ce77d05a98787f43c5e165f541b8c299887d9b2d1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to downloading a video player. The presence of numerous embedded URLs, many pointing to PDF files on various domains, supports the hypothesis of a link farm designed to distribute malicious content or phish for credentials. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://domilot.com/uploader/files/77142746081.pdf In PDF document text
    • http://monticellotownship.org/userfiles/file/rejadakusenepe.pdfIn PDF document text
    • http://compsult.net/userfiles/file/14487641400.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/88757305029.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/75578885819.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137509135bae---30450775276.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/44711228997.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/gexoj.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/derunoxedududawupusiva.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/13723429422.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/fuvup.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/datudujosodaxetafibadezi.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/gojusupadiwo.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/besepaz.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161364fbc7ff00---kitokedizezukima.pdfIn PDF document text
    • http://getdol.com/page_data/file/jopiwute.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/13669701691.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/48767182601.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/fibefotubodenivemiri.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/xosujomebugaxixisoro.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/85752494994.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/dotuzekelidamafoxokubuk.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/18349440933.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/kuneni.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/nagoperoxesisiboxiluxis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=sax+video+player+all+format+2020+free+download+apk+downloadPDF 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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 17520 bytes
SHA-256: 694ab2e5966cb4f1e8fc1320105d792de430ec5d3a55bccefb8b74cec84ad81a
font_02_sfnt_off000125d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D9 11268 bytes
SHA-256: 046c6f14030c700d3253395b826129f7f07c8146d7792eac99a657355d0b4d94