Malicious PDF — malware analysis report

Static analysis result for SHA-256 810fa0a042409e36…

MALICIOUS

PDF

76.8 KB Created: 2021-02-24 14:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4824e0ed1124611f9e8a61b32d33a25 SHA-1: d7c2736b1894d876a0c2ba91a791b9a1486bc418 SHA-256: 810fa0a042409e364946cba96c2f0ff23111d6fe69cbb47d1caeb395a607c6f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1555 Credentials from Password Stores

The PDF document contains heuristics indicating it is a phishing lure, specifically requesting recovery secrets or private keys. The embedded URL and document body content suggest a pretext of hacking Facebook locations to trick users into providing sensitive information. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://leonvi.ru/wix?keyword=how+to+hack+someones+facebook+location
    • https://cdn.sqhk.co/pipidopowewe/tp2Cjc3/battery_tender_plus_costco.pdf
    • http://alcozerox.com/ruxif8o0hk.pdf
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5ff6af477094a.pdf
    • https://cdn-cms.f-static.net/uploads/4417807/normal_60175da9e62bf.pdf
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/wizeguvomuzeb_dogimi.pdf
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/winujemusej.pdf
    • https://static.s123-cdn-static.com/uploads/4465024/normal_5ff516a03deb3.pdf
    • https://cdn.sqhk.co/gowexenopa/sij0zgd/private_number_app_for_whatsapp.pdf
    • https://cdn-cms.f-static.net/uploads/4404738/normal_6027214d96813.pdf
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/1f56546939acc22.pdf
    • http://betflixguvenilirmi.com/gta_5_cheats_pc_free_downloadc191f.pdf
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/satobumowulokitov.pdf
    • http://momentikshop.space/70442171989hlwgw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://forimewobelik.rf.gd/audiolaby_pro_apk.pdf
    • http://pujopomenuzejed.epizy.com/caballero_bustamante_laboral.pdf
    • http://junedujivoxoz.epizy.com/b_pharma_application_form.pdf
    • https://s3.amazonaws.com/jipowumat/nigedibizujinumaxozin.pdf
    • https://s3.amazonaws.com/juzowilipi/heartbeat_tattoo_wallpaper.pdf
    • https://s3.amazonaws.com/widofafane/amharic_numbers.pdf
    • https://s3.amazonaws.com/nigimul/89552671323.pdf
    • http://sikofus.epizy.com/best_online_coding_platform_for_beginners.pdf
    • https://s3.amazonaws.com/lukepepe/33960513873.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_off0000efb4.bin
a11039e3c37b18709d6cbb519be3097c8250a877f135feeff005aad402a30423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 5284 bytes
font_01_sfnt_off0001019b.bin
e9b68a9f2e3e77ffd6a4425a47fb2f6706198d83bf93c92e4b6da32fe5c5ef6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 10532 bytes

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