Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1f1397a584ef10…

MALICIOUS

PDF

80.3 KB Created: 2021-09-23 14:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d1f916a816f290420bc85a79479a0813 SHA-1: fd59c0866118c645b3629eb712f147d8114cf2cb SHA-256: ec1f1397a584ef10cd0267d63ba7bb476f387c8b1e08e7087501ee84cda27829
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to potentially disposable domains, suggests an attempt to redirect users or deliver a secondary payload. The file's structure and content are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://herium.net/FileData/ckfinder/files/20210916_1165A9FA76CD96E6.pdf In PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/96878367774.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/lopab.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1632327520.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5cd5b84f8---ropixivadixufag.pdfIn PDF document text
    • http://gosapahostel.com/userfiles/file/xajonekesulogo.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/dawolafu.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/nibibinexuxegixagexa.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/zazarinuvagokej.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jofik.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/68316061899.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/fowatili.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/59203025042.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210911_224832.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/wigavosusugasakokaf.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/43016900575.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/50334410857.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/mopexuwovijilusa.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ead94edfd9---penikifedan.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/xovimepemutigexokafojim.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f67904449b921f7dbe04143009fbb655/legufetuwobizadonumiwud.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021091518004333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=unihertz+jelly+2+price+in+pakistanPDF 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_off0000d0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C4 10872 bytes
SHA-256: 919ceb8501caadb2bd052c54ca0b8fe6f9a3493e9b031ce39213992202299cc6
font_01_sfnt_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 18948 bytes
SHA-256: 0243d63d164843a5738371af441f195a21cd843fd536b3ba5d1dc87466dc7efb
font_02_sfnt_off00011be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1