Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea6c0b2dc54f98b…

MALICIOUS

PDF

71.5 KB Created: 2021-09-25 02:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e67ce60d7d39affaab203d7dee334c5b SHA-1: 963876955e9f951025967ab0839584899d16be13 SHA-256: 6ea6c0b2dc54f98b4b8f6df40ae74993b2e6dd4b26637f2124188a6d117a8ca8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, indicating a malicious intent to redirect users. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • 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://baatco.com/ckfinder/userfiles/files/5880860664.pdf In PDF document text
    • https://artesapanaderia.xyz/aym_image/files/21587214771.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71723133574.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/10754503121.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/4ce00ff4820f655da4a714031a497479/molevomonanagar.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/74215994885.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/sadolova.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210911212923_3i1gbz.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/23111453612.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/90207120169.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/femarilu.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/51516157536.pdfIn PDF document text
    • https://shibbirs.com/media/files/xuwezaselipibezodoxuzugu.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/90143783963.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/45184700826.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/menaguxekofuv.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/resaludawenaponasa.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/jamosoxefimukopuge.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/96538578496.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/zaxerirovinazebudufofuv.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/81882058841.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/64793265544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+install+omegle+on+androidPDF 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_off0000b1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F4 17276 bytes
SHA-256: 01a8fbd84b64f086a4240d5f80772e09461d4a1f509e605d7b9c07b8acd5286d
font_01_sfnt_off0000de2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2F 10668 bytes
SHA-256: a9b4509c88e1c4d2a5731708ea42a0401b31aa4563a764e2d60c2a4e62466386
font_02_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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