Malicious PDF — malware analysis report

Static analysis result for SHA-256 53efa33a0f7e81ad…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 22:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5292790e80c28cabd444b1cc351dfb1 SHA-1: b12170a134f17b7a54085608a32514dc1acce88f SHA-256: 53efa33a0f7e81adf78d63562b44fcdcca0eaca91b8774ee2d6fb67095d888ac
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are designed to appear as legitimate search results or document downloads. The primary malicious URL, 'https://midufefew.ru/aws?utm_term=seagate+goflex+home+root+password', suggests a phishing or credential harvesting attempt related to Seagate device passwords. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=seagate+goflex+home+root+password
    • http://laserisesiseno.getenjoyment.net/rozunaxakumeku.pdf
    • https://cdn.sqhk.co/kuzosexiwugu/OjdmpNY/80978816562.pdf
    • https://sizasaligibi.weebly.com/uploads/1/3/4/5/134506534/1991cb1.pdf
    • https://baxukeze.weebly.com/uploads/1/3/0/8/130874478/1855258.pdf
    • https://lekikibobasiva.weebly.com/uploads/1/3/5/3/135350768/jezeselobazefap.pdf
    • http://bewudewumit.sportsontheweb.net/50531117688.pdf
    • https://cdn.sqhk.co/muluxodipoto/vjfQgc0/real_steel_world_robot_boxing_mod_apk_ios.pdf
    • https://cdn.sqhk.co/tokarikadez/hhiimks/learnzillion_guidebooks_grade_7.pdf
    • http://nitapida.mywebcommunity.org/bagusabonoravorozafe.pdf
    • https://wedikeme.weebly.com/uploads/1/3/1/6/131606111/d6adf5f6e130ce6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/muvarelo/color_by_number_periodic_table_worksheet_answers.pdf
    • https://78ee58ad-4251-4cb6-9d9e-6f806931ac90.filesusr.com/ugd/b6b4e8_ffe7f51eec714c26afcc5b338b9c40eb.pdf?index=true
    • https://fc9a8e44-b853-4378-b933-957c6fa9ceda.filesusr.com/ugd/1da781_1f65658ad98f44b5a898efca119a35cc.pdf?index=true
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_08a2f0c20e1c43908b67057a2c6988b3.pdf?index=true
    • https://s3.amazonaws.com/wupixufekijax/toviwasikiburinijorefad.pdf
    • https://s3.amazonaws.com/rewepalazamiso/49942273652.pdf
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_215b18fe87504c2e9a25597b9075ed0b.pdf?index=true
    • https://s3.amazonaws.com/biwubeleba/fnma_guidelines_on_student_loan_payments.pdf
    • http://japinoxizidunub.myartsonline.com/automatic_control_of_aircraft_and_missiles.pdf
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_e20ca336e99341339ce2eb2e74e0bcdb.pdf?index=true
    • http://vumovofun.onlinewebshop.net/42203446874.pdf
    • http://nisetekotixob.myartsonline.com/cara_belajar_bahasa_korea.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2b.bin
6cc8081f7394eb2caef81ee1cade0ae4687922d6fe8420571b14e54268d07eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 5352 bytes
font_01_sfnt_off0000fe76.bin
b91de85900c4aaee3b8eb3b637be04cdca6611e31ca684e4aa6cfe81a1fde5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 12112 bytes
font_02_sfnt_off000126bd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 4324 bytes

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