Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69b7084ca7aada4…

MALICIOUS

PDF

84.9 KB Created: 2021-09-13 07:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: efba9e030fcee7491546c4da76f8e23a SHA-1: 185ab2edd540b0343499246eb97d003d231df0f2 SHA-256: a69b7084ca7aada46ddff990038991859ff647d53da05ede87eb5e86792cef6b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. The heuristics indicate it functions as a link farm, with several URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection attempt. The 'Payment redirection / bank-detail change lure' heuristic strongly suggests the document's content is designed to trick users into altering payment information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • 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://sunsoftinfoway.net/ckfinder/userfiles/files/doxafidotubapatadad.pdf In PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/57608263652.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/38978057618.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/17507670841.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/86226916119.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/37630230148.pdfIn PDF document text
    • https://wasael.com/userfiles/file/radatopamowisobodolutudaw.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5180c46698e1de6abff6fa1331bca157/26804965958.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/bdc04513923d85dd359d20c63f5b0ad8/3931822306.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/61698157531.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/kunepiwe.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/tovoramelimijuso.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42625146046.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab0726af97---35049003902.pdfIn PDF document text
    • http://zgic.ru/!upload/files/31521856390.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/7200720726.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/pesirinoso.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cfdbab6a4---sabezilopu.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/rowemozifobunerumu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/76994eb692b7ba2b3a9d18967afd1245/18450528988.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/lubafuvesaxa.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/rokiwewesojug.pdfIn PDF document text
    • http://skupka23.ru/upload/m/fotexudaf.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/mudujisumapeno.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/lafoxanofukakulekugitosof.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/46698646439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sync+contacts+android+to+gmailPDF 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_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 18772 bytes
SHA-256: 8674e57c6944cb06e043a5cb393d3c3307860284b2f0f5d1795a2390777fe83b
font_01_sfnt_off0001150c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D23 10772 bytes
SHA-256: cc78cdf3bc1749a5c4b88edd7259803055edbbad4f17ace7eb33ec44f2705306