Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1782fe0b84919e…

MALICIOUS

PDF

84.7 KB Created: 2021-09-14 04:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b5c69903af13fcb550eb317032fde16d SHA-1: 2387c115ef639379d9b324159bfd86df4832a950 SHA-256: 1d1782fe0b84919ef48c77e7f7fa8d317ca4176581da3ea71a911d402e477231
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting an attempt to obscure malicious destinations. While no scripts were explicitly extracted, the nature of the URLs and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://astorandblack.net/emailer/userfiles/file/kebetijuzuxugirotewax.pdf In PDF document text
    • http://hyeminshop.com/DATA/files/40003727258.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/geruvuvogokaliv.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/92971364589.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/xugijilajafofuruxakutaj.pdfIn PDF document text
    • http://serviceelectric.ca/userfiles/file/33402265631.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/70201751699.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7fab0a568---gojer.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/jazidomuvoposowupisaruje.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/dijipulitefebiwa.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/76840974795.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/73551582737.pdfIn PDF document text
    • http://ombs.ru/uploads/files/visure.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/qghn5rfdui833o8vq5epa7p1gu/damajix.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/jirezepenasin.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/finusuvavokilof.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/98633084748.pdfIn PDF document text
    • http://fgosvo.ru/files/files/judobaregijedulowanewenek.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/87288118770.pdfIn PDF document text
    • http://effekt-film.de/files/file/21845774514.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/91666022915.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63612445928.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/75234339231.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/toged.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/77542007282.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109140509131114.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/vedavuxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=frontline+commando+ww2+mod+apkPDF 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_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 10784 bytes
SHA-256: 093a2272626dc417fa2fc222cf5ec983a92da8d3f06fc50fb7da1fbff395e0b9
font_01_sfnt_off0000fdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF9 18012 bytes
SHA-256: 3e56bd2007c0bf4ab156aa29d0a8e2226fc7c21501cdc164a245a462d5a3fdd2
font_02_sfnt_off00012cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1