Malicious PDF — malware analysis report

Static analysis result for SHA-256 9760f15c8d1d9f16…

MALICIOUS

PDF

68.1 KB Created: 2021-03-29 05:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92a23c4fe83975c300da22ccc822f17f SHA-1: 17ab26ba5bf82ab62ea3dbafe764d8c5e2941c4b SHA-256: 9760f15c8d1d9f16d99eee175766fa1917e1646ab78f22254d4306b730a41885
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/award?keyword=al+quran+dan+sains+modern+pdf
    • http://vizionsmc.net/cazadores_de_sombras_ciudad_de_hueso_pelicula_completa_en_espaol_latino_hdmyubs.pdf
    • http://dvigatel.guru/presentation_of_intangible_assets_on_balance_sheetgmzza.pdf
    • https://cdn.sqhk.co/jebixusugak/wWgihi9/popular_hashtags_today_facebook.pdf
    • https://cdn.sqhk.co/zapevexuvot/ja9idjc/coffee_shop_3d_design.pdf
    • http://romeoplanet.club/61783785008uqobb.pdf
    • https://cdn.sqhk.co/moxinivo/gfjcifc/candied_ice_cream_parlour.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a0c6d581-b93d-4267-ab34-7e511713739e/xutodijopoxesipi.pdf
    • http://kalilom.epizy.com/cinema_4d_journey_course_free.pdf
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_4514ef4161e04326a751ea690cd31d9a.pdf?index=true
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_18111657602a42be85aae2177930feb6.pdf?index=true
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_b916013cc840458286ad9f0a52ea0124.pdf?index=true
    • https://uploads.strikinglycdn.com/files/926f022e-f14e-4022-b2bb-0a3c4b9ae4e1/gabafopilede.pdf
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_c5342e55568d4a858711264c6d37aec0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a462dc76-001f-4d6e-a4d6-ec5e2bee6dd2/59549004849.pdf
    • https://uploads.strikinglycdn.com/files/ac9aaf64-e20b-4365-8d0b-6eef4b051aad/bagobikevora.pdf
    • https://uploads.strikinglycdn.com/files/a7094a4b-36b8-4cfb-8d7e-6ac46bdde0cb/soreresomadugixovudipari.pdf
    • https://uploads.strikinglycdn.com/files/d671301b-7908-4a96-b006-8d2b7c5e25b2/64227480869.pdf
    • https://uploads.strikinglycdn.com/files/f82d7e20-6248-43b1-9a99-7618eac19f8d/what_is_the_difference_between_snmpv1_v2_and_v3.pdf
    • https://uploads.strikinglycdn.com/files/684d5cfa-41b9-4c45-8997-bd2c1a8bb985/spring_framework_certification_dumps.pdf
    • http://watokugen.epizy.com/walabixebi.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8fa.bin
332a50b9c922b6e0db11e9bee4839584cca9ef9c6711868dcd20eda0750aee16
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 5300 bytes