Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3b4928919ead59…

MALICIOUS

PDF

75.4 KB Created: 2021-05-16 05:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 75d16ac381c21a740606d57927996ef1 SHA-1: 22b73f563416c0cc22b36116f590e4f41c524546 SHA-256: ac3b4928919ead590720311ad482439309efc4d387ad6461f0e7ab3617671051
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers have identified this PDF as malicious, specifically a phishing or trojan variant. The presence of an external URI heuristic further supports the malicious intent, likely to redirect the user to a compromised or malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=how+to+describe+dramatic+poetry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404133/normal_5ff4d8ca65e4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464053/normal_5fddc2505c96b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446944/normal_60085c03eb8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_6010057a41b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_6038592589c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_6054731a3f8e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380707/normal_5ff454cd96368.pdfIn PDF document text
    • http://bioforce-co.site/32839388594fu74a.pdfIn PDF document text
    • http://myfoxing.online/125305809062jxjc.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/el_pequeC3B1o_nicolas_resumen_por_capitulos0m085.pdfIn PDF document text
    • http://deutschebank-meine.com/what_age_is_artemis_fowl_forxs07m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwiwozeko.rf.gd/washington_dc_ronald_reagan_airport_hotels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e336722-3b08-419d-bd08-08e01e67ee99/clearstream_2_tv_antenna_reviews.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_de612601a4354842a4280e7db5cb1096.pdf?index=trueIn PDF document text
    • http://ninukak.epizy.com/93500440088.pdfIn PDF document text
    • http://rokodukewab.epizy.com/a_gentleman_songs_ming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb46206-7135-4cd1-bffa-d3dc64e719b4/556332317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d2917c-a0e0-4886-8bd4-83c7e381eb23/dozasiwuxowadevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580a6c85-87ed-4fae-ba9c-936be8dd133d/cyberlink_youcam_7_crack_only.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_f2291987a07446379fa77e629cb65ac3.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_904415ca75c04bcd8eb826585d126ed1.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 5484 bytes
SHA-256: 7a4221ee0c71567e90eef83d7c878114e5ffbdafebac4ef321690522f6fc7f40
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 10260 bytes
SHA-256: 6896f07f7381f34abebd0c342fa27e5b40f0282a075baffada2c38697ec6c821

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