Malicious PDF — malware analysis report

Static analysis result for SHA-256 9baaaa9cb0edaec0…

MALICIOUS

PDF

85.5 KB Created: 2021-09-18 03:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 41163892ceee719ce2a983bc09896882 SHA-1: a4cc8a6e1f5a61c90abe0ac94046b4db7e4f515f SHA-256: 9baaaa9cb0edaec052e97a4be820945a8c6129dbd5cb306c1c59a9a0f99bc313
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution campaign. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The primary attack pattern involves directing users to these external links, which likely host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bonezi.morefriendship.com/upload/files/fubikevunu.pdf In PDF document text
    • http://incomingmakedonia.com/files/files/45810341802.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/wejasani.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/dosixojeketowubefaxekipez.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/zemejoro.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/67086759384.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/21948134555.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/dobadimibizixapanobipemo.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e2b8d3d2f---sefetofalolagowof.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/gewokijodogirutokax.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f98ddb58a1---filuleganemu.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/kupajufipuzigemoxaperifa.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/96098690786.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/48376319227.pdfIn PDF document text
    • https://chungangroup.com/uploads/files/202109040805124177.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/tepirozafibogalom.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/37591094224.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/97584439162.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/jivol.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/safevenewunugumujafoket.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/befigepefudibowoduvovivif.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/60384159767.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=n01+darts+app+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_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 19684 bytes
SHA-256: b65cdbe9648e1a8e81eaec9bffa883f4b5f7f662d25828b05cbe9684c6b59eb1
font_01_sfnt_off000118cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E2 10360 bytes
SHA-256: f9ccfe6b32d159b7a2b77206b4f5d47e7746d51a665c3952e232d623d462867b

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