Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7e40eec77429d9…

MALICIOUS

PDF

81.9 KB Created: 2021-05-24 23:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: acf932ef42cdc8551aa77890e4513740 SHA-1: 552339e681897cd20fee08d4de3a213cc37a6232 SHA-256: 7c7e40eec77429d9c25193ea264db3616762febe81c83d9cc99c09ddd8773f01
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'anti-stress anxiety relief mod apk'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=anti+stress+anxiety+relief+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fdeb29e58809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_6012fc71daeaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5fd621db0b154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_601bdf83e5b96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489843/normal_5ff671b1be14c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fe315c639bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fd64735f2977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501360/normal_605f919814043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494866/normal_5ffcc7ec75b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5fd2aa8770ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_6023f09772b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_6069f3dd9f5a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_606e576d0f20c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gasodamuza/vidobakapafexurasiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/how_to_write_a_good_piano_accompaniment.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/assamese_film_ahetuk_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/13797057140.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/77990153764.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/8813881055.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/14668894031.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/lapd_police_report_status.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/first_grade_math_homework_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/video_editor_app_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/megadimension_neptunia_viir_true_ending_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/vivaldi_summer_presto_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5196 bytes
SHA-256: eed7245bef9558749a645e4c8b27b30126db5c6b11a595ce98b666bc0c08fa49
font_01_sfnt_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 10572 bytes
SHA-256: 852c42f38e22cb34e4d0dfe16de2eae939a24cc9186285566acb7a2fc39daa40
font_02_sfnt_off00012bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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