Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f177b3c5e0a98b…

MALICIOUS

PDF

76.9 KB Created: 2021-05-10 01:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47f8554422d8109b6f80395e013554c5 SHA-1: d76efc3bd8063c4f9aa12982a107ad2a175b907e SHA-256: f4f177b3c5e0a98b10c634d6cf960cc57b793eef24d769e96a75f86ad824aca7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for malicious purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://jacksth.ru/strik?utm_term=how+to+set+la+crosse+technology+clock+wt-8005
    • https://cdn-cms.f-static.net/uploads/4404753/normal_6050760010854.pdf
    • https://cdn-cms.f-static.net/uploads/4474989/normal_60326d7f3156a.pdf
    • https://cdn-cms.f-static.net/uploads/4384851/normal_5fdb2afe1d474.pdf
    • https://cdn.sqhk.co/pufojoloz/CQDSeha/field_hockey_hd_wallpapers.pdf
    • https://cdn.sqhk.co/zoluwumenad/ONsiiWm/kolerufiriti.pdf
    • http://bokusikeze.iblogger.org/medea_euripides_espaol.pdf
    • http://gagarinski.su/how_to_find_air_density_with_pressure_and_temperature4uw6l.pdf
    • https://cdn.sqhk.co/dasotipamu/1cjhCHa/v_t_bhattathiripad_books.pdf
    • http://meetchambre.xyz/4962374348909bgr.pdf
    • https://cdn.sqhk.co/gotofebelu/jci0hfc/todexuzaveziwabokuju.pdf
    • http://bcpreactiva-enlinea.com/networking_color_codem8qej.pdf
    • https://cdn-cms.f-static.net/uploads/4443803/normal_603674413fe88.pdf
    • https://cdn-cms.f-static.net/uploads/4464314/normal_60334c37b3a06.pdf
    • http://yewes.space/mozofinosugiluxagayab8h.pdf
    • http://imm-shoes2.club/android_rss_reader_with_images_tutorialtfwvf.pdf
    • https://cdn.sqhk.co/jilowepe/b1jehgo/fezaniwibogugojagezate.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_af48e7cc7a154f37b64fcdd8eed75784.pdf?index=true
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_49274528cd8a4229896b1fbf2a1adf89.pdf?index=true
    • http://bukaduxanob.epizy.com/22093909573.pdf
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_737180d0c78e4715925a65e33f58c7c1.pdf?index=true
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_d624a9a5d61040cdaaec5a29c02c552b.pdf?index=true
    • http://jidowadosul.epizy.com/b._ed_exam_form.pdf
    • https://s3.amazonaws.com/wokesabisevo/programmable_logic_controller_training_course.pdf
    • http://werodusemojugo.epizy.com/sales_and_marketing_duties_and_responsibilities.pdf
    • https://s3.amazonaws.com/vuliwisuwig/wugudepig.pdf
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_6945ddd0f4d848debb1f8b52347beb4b.pdf?index=true
    • http://getetir.epizy.com/tencent_gaming_buddy_ff.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec66.bin
80ec25a14cc3178e239d3f620606601ce4effc252e7d4a160c224c94c1396ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 5772 bytes
font_01_sfnt_off0001002b.bin
19b635d25ab0ca6ee74f769a78f6cbd42b3557b6fd186349baa96ddd2db7d1f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002B 10968 bytes

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