Malicious PDF — malware analysis report

Static analysis result for SHA-256 93390c9cf0a052ca…

MALICIOUS

PDF

85.5 KB Created: 2021-09-17 11:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5387870b4e51434054d40e61efd1d600 SHA-1: e59c04d5e16ba96f18fddfece9574965d598dd51 SHA-256: 93390c9cf0a052caa4d6560478d2a2bd61648a9cd31dc3a203584fac78f36b46
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that redirect to various domains, many of which are structured as link farms. One prominent URL, 'https://irlanc.ru/uplcv?utm_term=spider+man+far+from+home+free+123movies', suggests a lure related to popular movies, aiming to trick users into visiting potentially harmful sites. The presence of multiple disposable hosting links further supports a malicious intent to distribute or phish.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=spider+man+far+from+home+free+123movies PDF link annotation
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/4429376310.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/radaxufexiligeg.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d89d0160acfa82aefb31ae6f0798cd50/lomijod.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/14836382367.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/kifevenavexemakuw.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/pagunugaviz.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/bunekawifawaxelilujawan.pdfIn PDF document text
    • http://princeverma.in/uploads/files/84014608124.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/rizulugogap.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/febedozogu.pdfIn PDF document text
    • https://endobible.com/userfiles/file/webaxawi.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/40652646308.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/41259863985.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///49053120083.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/bobepomapup.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/dekedexidanudajisus.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16130273b7a144---sogojijelelobepitevejilo.pdfIn PDF document text
    • http://zubrcup.by/files/files/dililejijekerebijuvovu.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/jomiduwisa.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/mukidigifelokos.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/luxewoxemez.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/16768184622.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/zerabuteka.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/93119358222.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/kibasoruv.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_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 11104 bytes
SHA-256: dc437ee436c91dc908ccccbab694f9a6fa39a107cda417fb1a1e69c6a5eb0324
font_02_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 19384 bytes
SHA-256: bfc7f23df41a084db27b13fbd2ef6c1ff0b87e748a8dee45fcf1437f40003097