Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a68b099ef31b10…

MALICIOUS

PDF

77.3 KB Created: 2021-03-16 00:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5a88c80e11c8cb6d9766d142bbee555 SHA-1: ed56cb0c44f08d2dfe83fd1fc736a69316e4af46 SHA-256: b9a68b099ef31b10f97b0589b6d66f66cf1f63fab0cf332008aae2a070ce8b5c
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, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'genetics lab report'. No scripts were extracted, but the presence of an external URI strongly suggests an attempt to download or redirect to a secondary malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=genetics+lab+report+drosophila+melanogaster
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fd9288ab40db.pdf
    • https://cdn.sqhk.co/xorilulog/VCwxNjd/devemisolivabanupixadafuk.pdf
    • https://cdn-cms.f-static.net/uploads/4471467/normal_6016925d08a4f.pdf
    • http://kobazugipodiv.medianewsonline.com/40380632851.pdf
    • https://cdn.sqhk.co/kikolibub/haBhbig/levujuvironubegejunarakan.pdf
    • https://cdn.sqhk.co/divoxisig/MMSjaii/taluximogekalujoxewupug.pdf
    • http://sewukagazub.mypressonline.com/mcgraw_hill_my_math_grade_4_volume_1_answers.pdf
    • https://cdn.sqhk.co/lefidotoxono/he9BAe5/plotting_coordinates_worksheet_grade_7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_10ec357210f24659b6c653ae9a0fe714.pdf?index=true
    • https://s3.amazonaws.com/genijusemu/20915608595.pdf
    • https://s3.amazonaws.com/geraromu/still_alice_summary_book.pdf
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_fec1e4df0c56476e810a5790f6244c40.pdf?index=true
    • https://uploads.strikinglycdn.com/files/401d0411-f71e-4e47-81f2-4e8706aa2654/10-3_review_and_reinforcement_empirical_and_molecular_formulas_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/ba0de1b7-b4cf-44f3-86a9-7092405ed64e/saxapodalejetusarisonebom.pdf
    • http://pudolajuji.atwebpages.com/gym_jones_workout_300.pdf
    • https://uploads.strikinglycdn.com/files/50f2049a-9c52-4666-b956-0503bd31b7a2/northouse_leadership_theory_and_practice_8th_edition_free.pdf
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_931c895ea006483983df96e307d4cd7b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d75f55c4-0686-4b9c-8284-98dd451dcd2b/42220437302.pdf
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_e020c8217e154e698bc7f3333f336f6f.pdf?index=true
    • https://s3.amazonaws.com/kudowo/wildgame_innovations_camera_and_viewer_combo.pdf
    • https://uploads.strikinglycdn.com/files/f8b1ba0c-c68d-4c31-923a-c00378b7f0d7/fozunipem.pdf
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_69f04f0794f843728aa86436937fee76.pdf?index=true
    • 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_off0000ee1d.bin
641e76d387c6717afa09a0066e2ad6be0f5dc170c31ae53d942517a012ae779d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 5656 bytes
font_01_sfnt_off00010128.bin
7a00a34d0d45f19d3c747a5c136a8f972b643e86bfbf91963fee90e3c11ca5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 11336 bytes

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