Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6bc542f7a4816c…

MALICIOUS

PDF

235.3 KB Created: 2021-03-15 02:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 99fdbe7d39085799fe73274889d78882 SHA-1: 99f9580dd816cd62b0cd9863b4ad2235154b3263 SHA-256: db6bc542f7a4816c7f4e5d9ecd486b325c1a2b84db282a3be39542bf27b71fe6
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body appears to be malformed or obfuscated, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://midufefew.ru/award?keyword=b+tech+eee+syllabus+pdf PDF link annotation
    • https://cdn.sqhk.co/lomasamube/gghhgha/most_wanted_game_free_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/AgjhbO5/clash_of_clans_downloading_content_login_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/phage1i/best_australian_craft_beers_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wotudasigeb/jhWjiA3/asim_azhar_songs_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5fd73cd8e9f5f.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/hhiiaz6/60410405339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_60462d64f1293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5ffdfbaa38bcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376874/normal_5ffb6710f3c73.pdfIn PDF document text
    • https://sasifebuwanozag.weebly.com/uploads/1/3/4/2/134234849/kapep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd3c87aea693.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/FBS82hd/syberia_3_apk_obb_download.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/6707166.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/1gjYd3P/miwokemesunudamawatakam.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/himjeTL/minecraft_pirate_craft_server_address.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jN5DAia/kozaxukenozozabi.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/iDiijaK/nadabemigadeludujige.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01bffcd-c3cd-487d-8d30-73f5e8549ba1/what_is_the_meaning_of_the_word_emotional_blackmail.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/52241674900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c4636f-7365-4327-8b91-ec4c8bd9abc5/puwululezewezanujuzew.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/gravimetric_analysis_experiment_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/84178223067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e79800f-d4b7-4b6a-9d5e-d60e9a76d10d/i_pilot_remote_keeps_turning_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d693302-a2df-477b-a39b-41eb023b7c43/21011936913.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/jinutinik.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3632A 5440 bytes
SHA-256: a1f3430a7530c1c2f14dd0dfc1c8e2eeec037a0f07acbae1d3ec76824a4ee4db
font_01_sfnt_off000375b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x375B1 12040 bytes
SHA-256: 0e98a9341afdc520d9cd43fedd32b005b2a4e975e43c0eab4040ca47c009fd12

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