Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3d109ad372c0f7…

MALICIOUS

PDF

90.8 KB Created: 2021-03-12 19:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b4cc2df1b5636170794b1bf9e3c54b88 SHA-1: d6f758035ad9362b5cc8e458d113433a96e7e8a0 SHA-256: fa3d109ad372c0f70ceed1239a6f09ccb19f8df0c24c59f51f4907ef8692cc8b
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 attempt. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, appears to reference a sewing machine manual, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=brother+sewing+machine+cs6000i+manual PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/mabojefareku.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/79639555858.pdfIn PDF document text
    • http://jekowatu.epizy.com/adobe_after_effects_apk_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b9cfec-dbce-47ac-a757-58fd31d1adf6/hamlet_act_4_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/android_version_8_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307f3d8f-24e4-484e-9d6f-45f9ce2da6da/swann_security_camera_reviews_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fca354e-7120-4630-bd31-e5a8945dde6b/zegusozujenagojubuzinax.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/aggiornamenti_windows_xp.pdfIn PDF document text
    • http://difugarulid.epizy.com/uefa_champions_league_2006_pc_game.pdfIn PDF document text
    • http://sawujasasit.epizy.com/sepse_neonatal_2017.pdfIn PDF document text
    • http://jitikatul.rf.gd/apostrophe_worksheets_for_grade_3_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/funuzepuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d368635f-5457-460a-a5f7-67514f80dc5c/mcculloch_pro_mac_610_repair_manual.pdfIn PDF document text
    • http://lofomaseforuz.rf.gd/bridge_of_spies_2015_full_movie.pdfIn PDF document text
    • http://kexojupi.rf.gd/brunnstrom_clinical_kinesiology.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/how_to_dye_tips_of_hair_with_splat.pdfIn PDF document text
    • http://ruvaseravijuged.rf.gd/17636330572.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/wotarazinad.pdfIn PDF document text
    • http://xivobotaxonid.epizy.com/what_time_did_the_blue_jackets_game_start_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26ebf6d-ce48-4fcc-9a22-afa0a6409aba/kozaf.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/asus_rt-ac66u_router_default_password.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_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 5648 bytes
SHA-256: cbea5b7e607ffbb6994571958f3fa98713d8b492d3b1a2e9fa4cddd66887cb31
font_01_sfnt_off00013870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13870 11032 bytes
SHA-256: fef5cd2991c66959fba8701b3ae849f71e29c7aa0d8b19ae78ad678cbce3a8e1

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