Malicious PDF — malware analysis report

Static analysis result for SHA-256 5013e6f1aa635a29…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 23:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ce4e9d7335f44cc88e4917182a040be SHA-1: 94de4dbf12534b514f0d81912e43c3d67e344170 SHA-256: 5013e6f1aa635a2921fc1cc8187559e034de1adb5c8459a60eeb2b527bb235f9
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and numerous external links suggest an attempt to redirect the user to malicious content.

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 http://radio-salsa.fr/php/rs/filesupload/file/renamogekidijudital.pdf In PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/dijakum.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/nudowasoxerubuxurasowonu.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/139502494.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/jubalofuzolepodilubukem.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/wuvoxaravewagu.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/42175887385.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/4322598495.pdfIn PDF document text
    • https://jobtiara.com/files/files/roderekefewefalisa.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/dozufijuvejutepudujitox.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/58026905578.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/48067873381.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/xurinikogorobo.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210904215626_1719881545.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/36594229638.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/50453329608.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138a57a59f25---felugekumagajofapowaka.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/zasasazejutos.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/vanorogasenipatipikebok.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/gigakunezixedevewivujuz.pdfIn PDF document text
    • https://cargotavio.ru/files/file/8850582770.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/rureralusur.pdfIn PDF document text
    • https://palet-school.com/files/files/26642227266.pdfIn PDF document text
    • https://sanagustin.cl/files/serigag.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/fonodelagupisotewaxawujal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=free+gameboy+color+romsPDF 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_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 10512 bytes
SHA-256: 06d70a905dfb8dd62ae71ab6738c28fc6962bc7a2d76bcc7088cd6d3b2e4f05f
font_01_sfnt_off0000f4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C4 17536 bytes
SHA-256: aca0c29326226a7d78411376205304c276b617b0a61b387437b7c24b7ccec156
font_02_sfnt_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1