Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2af11b042eb2f65…

MALICIOUS

PDF

72.6 KB Created: 2021-10-01 04:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 769a8c5348f1ae0fba7b20baca5d0ccb SHA-1: 08d51dfcf91432198a54699d23ed68f1cb03ec3f SHA-256: d2af11b042eb2f6587c790835419da4ef5b1a969df405500087b30e3d20c037d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded URIs are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://inwebjor.ru/uplcv?utm_term=last+christmas+full+movie+123movies PDF link annotation
    • http://medica-eg.com/userfiles/file/xavipowafuz.pdfIn PDF document text
    • http://klhl.com/userfiles/file/17804870558.pdfIn PDF document text
    • https://pindimana.in/uploads/file/vajumegul.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/ramikurasolomi.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/fofimijopukinijuzop.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137821b3fd62---xoxusoxavenanaxuz.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/55268449866.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/93828755814.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/pinarupobawixufet.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/77064139974.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/45465397414.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/41146823841.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/tasigep.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/63445991794.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/pilipovibixebekot.pdfIn PDF document text
    • http://inspeq.eu/public/files/38801597401.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/67831746680.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/lisamubosobizevu.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/vosewet.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/23696450414.pdfIn PDF document text
    • http://webhosting4.net/media/file/51002388337.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/38135973882.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/48884981844.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_off0000b594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA6 17516 bytes
SHA-256: 1c441b8ec8619e1942b8e05c004acaecce3b31a13411ec1890ec7799ce643862
font_02_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 10964 bytes
SHA-256: 3960df203e7b891b67396a94ffbf626a10939fac47f020644c670df896fb591a

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