Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cd2479ee1083ea…

MALICIOUS

PDF

74.8 KB Created: 2021-09-11 02:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7667e2b8d9334d5108fc016030e58e7c SHA-1: f1e140d664fdced67ae3b213dac8e0265703fe55 SHA-256: c0cd2479ee1083ea6c3c1ccb7951e3b1657815a2541e666c1abcaf800bc1d085
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting, characteristic of a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=download+emoji+iphone+ios+13+for+android PDF link annotation
    • https://www.ruchya.com.tw/upload/files/80581803134.pdfIn PDF document text
    • https://desco.scp.hr/files/nazijolijo.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/97482482176.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/guxirokuder.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/87083711884.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/2750646867.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210910_2D8F90E84A2B7098.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/luufrp9j9fl148t1vibg3qpm7n/penobukibozob.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/batimugadekadag.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210901_4c445.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/mozaxatejan.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210902025024.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/pumexobukomeduteledogun.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/woxirafutut.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133db72827c5---zozowitomejeneru.pdfIn PDF document text
    • http://anpharma.net/upload/files/69336756391.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/dupilokakituvid.pdfIn PDF document text
    • http://toonesk.com/upload/66132250330.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/71989170131.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/49633839086.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/26186227688.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/fegodekerijagasikubope.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/16092264000.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/ponerobiruvefaguwi.pdfIn PDF document text
    • 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_off0000ba94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA94 11108 bytes
SHA-256: d1be5a084d6737b1d4c04b7492903e2c2984c664d9310db75351311e29316b16
font_01_sfnt_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 18944 bytes
SHA-256: 31e2614e41d259b65b79f08a394d3f2e622bd085ce70672222b46aa555dcdf00
font_02_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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