Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d6e1079133c8e8…

MALICIOUS

PDF

79.5 KB Created: 2021-09-13 09:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e96011a3e3c085c2f1b25c56131fc19e SHA-1: e2affc024baf82a08d708434efcca6dc577e66ce SHA-256: 70d6e1079133c8e824de101249b3a937158024305e78aca062d4b08e93e11939
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://dxline.eu/userfiles/file/sepili.pdf In PDF document text
    • https://mgs-on-track.com/uploads/misc/files/vedexawusudadoke.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/88021370990.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/46668758821.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/wibegawowofogezirusuzur.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/maxopiwatibolupapamuf.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf337256b2---86304010681.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/lupanududimuvasu.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/jozovaram.pdfIn PDF document text
    • http://inica.org/files/file///75423736966.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/gativa.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/dulasopeborupotodeselu.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/45281781204.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/48323175918.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/38802676792.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/tutatilajitijimudun.pdfIn PDF document text
    • http://intertravel.hu/_user/file/wizekodadonetewipiz.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/wexalukegis.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/peruvekogabagemojoleja.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jofik.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/xexen.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/liguvavuf.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/dotometafekejekebilubif.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tijonemediwisoleru.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab50f42b8f18eda3b415cb33dec68044/solerowafigozanemipotope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=coin+dozer+world+tour+apkPDF 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_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 10584 bytes
SHA-256: f23b1cb148be63df95bd1e19a8049eb2bbf4f2ff823532ee52314b9a458d3263
font_01_sfnt_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 17236 bytes
SHA-256: e8378953674b5b18acb942f6ca92a95f9541199051e0021e96f46831dfc12140