Malicious PDF — malware analysis report

Static analysis result for SHA-256 007fe062b3f98790…

MALICIOUS

PDF

78.1 KB Created: 2021-10-02 15:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cfbb2ae1da1fff955444c57b83224f90 SHA-1: 74c928f59685265dbe56fdac1f2258d5f0986fa9 SHA-256: 007fe062b3f98790c1131d5157feda08e0ae3659fb830845311408d97c2f7484
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://zjgyuanhong.com/v15/Upload/file/202193551482304.pdf In PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/59399286784.pdfIn PDF document text
    • https://basisnomor.com/contents/files/36059877421.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/zawetaxezarogoxetub.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/57490970808.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/6401132829.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/58031936409.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/6372429111.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kfonuf1cahfbsb0qc5f19dcsaj/nunuwadepizaxadituluvas.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/95663251193.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/zepufezolusekazovela.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/59046572500.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/68833355626.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/vejotefekun.pdfIn PDF document text
    • http://art-ball.net/files/file/37745744178.pdfIn PDF document text
    • https://petikdaun.com/contents/files/82542872200.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/zizedudidiputoni.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/zavovow.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/davomewe.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/15197093849.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/punemog.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/55887032418.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d7e803cd3---64927908109.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109230951241125.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/rapazegukewijaturo.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/vudujodejulabopafako.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/66441936253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=clerk+of+court+and+comptrollerPDF 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_off0000c628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC628 19684 bytes
SHA-256: bce8ebe46184ca017f06e055893e3d2f729acbec033a2ac2d83395eab2bd3b29
font_01_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 10744 bytes
SHA-256: 15e9b394576ed4c4bcb8567e4e336f9417cabf1306fa758c425b152b512804d4
font_02_sfnt_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1