Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9cc8a3d156e028…

MALICIOUS

PDF

82.4 KB Created: 2021-02-08 06:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e76fc3589ee8c60cb1cab86f8f75e282 SHA-1: efab0ca03c136114336e2757e43c85a48fe4dc8f SHA-256: 6f9cc8a3d156e0283b423125f974c7643438931c8d46465c191432d916231e5e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a context related to search queries or information retrieval, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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
  • 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://maypoin.ru/aws?utm_term=k+r+y+ki+full+form PDF link annotation
    • https://cdn.sqhk.co/jefigujaxev/dIIwjcA/autodesk_character_generator_not_working.pdfIn PDF document text
    • http://sifulodidikit.22web.org/set_theory_problems_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_60121dc7bcfea.pdfIn PDF document text
    • http://fivabigenarewo.22web.org/bonoxewu.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/khaRhba/tap_titans_2_build_clanship.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/Drjd150/ledironixutiveperuno.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/egiah7B/3947440524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fc7751a93ec1.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/6igPibw/2708045326.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/OjaquqQ/1371353840.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/gficWhb/nofuzijuvalali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5ff2576136993.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/hgP8gjp/57017977747.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bexiguxiluk.epizy.com/57251692419.pdfIn PDF document text
    • http://xubobesirubujo.rf.gd/wilibumewomunofurinux.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 4660 bytes
SHA-256: b282f5497539e8bd588afaa9628079d97749f1b71558d52ae9d0bae62a22bcb6
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000faf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF6 11096 bytes
SHA-256: 9ff03bfdd2ba03d37b162f2e1a80d5db1bd43d2bbc56a891e4250174bc121f3a
font_03_sfnt_off0001212c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212C 7604 bytes
SHA-256: 1819b6123045bd67b02db7358c57103f564639aeb9c87e13bc2323189ade61c8

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