Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fab3f4c86c32f0…

MALICIOUS

PDF

69.9 KB Created: 2021-09-24 17:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f7138a304836eeedfadaa1e9abcdfee6 SHA-1: 766a6aae523d06ad70502ea8ecb0ee9f883088de SHA-256: 63fab3f4c86c32f03b2d69711fee7fc610c2c8bb6aa9681960d1a44382042aee
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. This suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://internet-trade.eu/UserFiles/file/74612303317.pdf In PDF document text
    • https://777mto.org/contents/files/82901948905.pdfIn PDF document text
    • http://rvhifi.cz/files/file/68545424823.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/64420107413.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/wemosisuxiditokanokolukex.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/32238556576.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/wowejidisulonepib.pdfIn PDF document text
    • http://bienbao.net/uploads/files/fulizajomibakunerume.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/12523638751.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/32648731268.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614c708a00238---16187679088.pdfIn PDF document text
    • http://kes.org/upload/editor/files/mudewivakopefanilo.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/nakesexabawamiripidixoza.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/79208354274.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/jekomil.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/42524307477.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/mavumuxisikotudorowegev.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109041949444287.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/37764453112.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/32364323647.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/39985480332.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/vuwivonup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=filmywap+movie+download+2019PDF 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_off0000aef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF3 16508 bytes
SHA-256: 21cffb60444395ff5a7721d2f29644a74cbb46324790be4ce936fcc3452234a5
font_01_sfnt_off0000d921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 10892 bytes
SHA-256: 56e80789a7155925a05d4e326be60ee234852cc84ada31229ab1f5015e197f36

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