Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7b54de8c08157…

MALICIOUS

PDF

69.6 KB Created: 2021-09-28 16:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 04f8d8664b04b136599fb68d678d4586 SHA-1: 49ad06615b9b7819d1f7b7fd17ad8cb145260864 SHA-256: 02a7b54de8c0815729232de7fad5bf2048cd76496191c9eee3fab6e90cc37f17
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links pointing to various domains, many of which appear to be disposable, suggesting a link farm designed to distribute malicious content. The presence of external URIs and the overall structure indicate an attempt to lure users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://yuanda-boiler.com/d/files/42122393053.pdf In PDF document text
    • http://webursitet.org/Files/file/89827998200.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/92090666807.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/45725132663.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630970283.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2021-9///202197347206547.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/ribegaviverodus.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4a4bea69326a564dea1693fbfacdaeb9/14233007468.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/duxakevuxelemopidesigek.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/nulofisejorodi.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/89461102385.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/96443269099.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/xavotebifelexib.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/39874003310.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/61701804931.pdfIn PDF document text
    • http://taxfreepoint.com/file/72084829555.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/rigowisulewesevev.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/75165075832.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/darozixawukajepalerejoda.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/314fcd9d12aa3220a9e33668eb3f137f/wamife.pdfIn PDF document text
    • http://eichler-kammerer.de/gegobedadijegojujuxifigov.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/gedezomigogivu.pdfIn PDF document text
    • http://186086.com/upload/files/34369246462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=football+mania+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_off0000af23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF23 17104 bytes
SHA-256: 3ac101e2628c1142374f131ad5e361ad2a8f82f2a1d803e12aba2cd0590fb7c5
font_01_sfnt_off0000daaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAA 10220 bytes
SHA-256: f8d2e9d9186293dd92b97b98e997d5b5b6ae423980fb18ead7a1e993dabce2c9
font_02_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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