Malicious PDF — malware analysis report

Static analysis result for SHA-256 b781c0fe54528405…

MALICIOUS

PDF

81.5 KB Created: 2021-09-18 14:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c6e334324b722640a070f5308fc871e2 SHA-1: 1a33f87bc6921c21177c42abb12b32a8b30993cf SHA-256: b781c0fe545284052a88229850e7c767fa1290daa37a99118bc5f992a057ec8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm with numerous external URIs, many pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://keluargamimpi.com/contents/files/93527769165.pdf In PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/rikesadodeverakodetewe.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/xewilaxat.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/59592815264.pdfIn PDF document text
    • https://evabizz.com/userfiles/file/visowime.pdfIn PDF document text
    • https://foulardfotografando.it/file/likagifilanu.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/natute.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16140dbf7e24e8---votuzobuzap.pdfIn PDF document text
    • http://tulga.ru/editor/files/25464865163.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/42150523724.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9bd67902e---dorixu.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/wodev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613017c96f3ed---1701741045.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/rizamurebevon.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/81647535145.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210901200709_3zie25.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/67586114828.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/249e3ff238c38406a8dbeb1d0bd56948/gerizokodiwewe.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/salajogowonuzudaw.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hcnrea7vscpnqt888o9kvm6ab0/11608712880.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/9215336497.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/513466024e030acf8afddab3939d9538/xaditovotijozu.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/65199458576.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/tufivivitufopur.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210902125105.pdfIn PDF document text
    • http://micruts.org/userfiles/file/kiloxugokixutanugitir.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/48001526705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=imani+the+chosen+one+book+pdfPDF 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_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 15940 bytes
SHA-256: 149f9394b92eb8a30aa3ba56207216d0f812c0b2a2e412c6fea8a92525828de5
font_02_sfnt_off00011f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5A 10924 bytes
SHA-256: 10a18b9f92d6e72e3581e7ccd32cc76fdfbcd5e7b549087ef97cbb666d48899d

Open this report in the interactive analyzer, or submit your own file for analysis.