Malicious PDF — malware analysis report

Static analysis result for SHA-256 7701b1494b82dd47…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 14:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d7ffa24cf62ab03c109ff1181cd57939 SHA-1: 50eb767fb19e0fa3ac1bd2c929e5a733fa2d8e53 SHA-256: 7701b1494b82dd47f9e5eadebe03898477a3e6a17ec0d981ac8a84ff181e7540
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. The document's structure and the presence of multiple external links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=android+tablet+wallpaper PDF link annotation
    • http://kanizsakran.hu/userfiles/file/85494110085.pdfIn PDF document text
    • https://akemi.ro/hirek/file/40618821139.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/kosesozateg.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d9cfc5f3a---pulonunutefa.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/96421459487.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/88566249332.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/74213181054.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/dozubovafufivogurafafus.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/fumatetawas.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/79430159368.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/bolukudabemowezemozoxibun.pdfIn PDF document text
    • http://mc-opony.pl/files/file/35834018296.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/5005651603.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/litoxevogeg.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/25063009111.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/54603707424.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/sovenunakaxi.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/lunaz.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/32186250572.pdfIn PDF document text
    • https://laser123.com/geektic/files/72566777522.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/rimana.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/fetogisaji.pdfIn PDF document text
    • http://www.celso.org/download/womigiwalamoki.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/21905299870.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_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 10424 bytes
SHA-256: 38d84e2e34ff6ad870f3d760a622d4a4c3bd0fbb6a08a40895edb213baba0de8
font_01_sfnt_off0000ef60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF60 17928 bytes
SHA-256: e4012ae0259546f959c743b633efe7ef1ddb28d87ed72209ff1f5f90ec3494f2
font_02_sfnt_off00011d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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