Malicious PDF — malware analysis report

Static analysis result for SHA-256 89cd1b56a656c0cd…

MALICIOUS

PDF

83.6 KB Created: 2021-04-06 01:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ab5b70b6f55de0bb35e1e60f784332 SHA-1: 1b52764bc102644687efd1335b6a5a9c03d1eaa0 SHA-256: 89cd1b56a656c0cd86383916a6c5fcb9939d89280a7068566fdb7baada94c9b5
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL and the document body content strongly suggest a phishing attempt related to obtaining a 'Tinder gold free apk'. While no scripts were directly extracted, the PDF structure and embedded URI indicate a malicious intent to redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=tinder+gold+free+apk+august+2020
    • http://leree6.club/zasonusajazujiwizapouxpr0.pdf
    • https://static.s123-cdn-static.com/uploads/4376610/normal_60067c8e5859b.pdf
    • https://cdn-cms.f-static.net/uploads/4480744/normal_5fe9cb40b8014.pdf
    • http://groby-ritual.online/genealogy_of_morality_quotes2h5gy.pdf
    • https://static.s123-cdn-static.com/uploads/4407087/normal_60082acea3f48.pdf
    • https://static.s123-cdn-static.com/uploads/4425224/normal_6007931db4d9f.pdf
    • https://cdn-cms.f-static.net/uploads/4365602/normal_601a022cc2539.pdf
    • http://natnat.fun/wejerilijatanozokejodiq3xy7.pdf
    • http://digitalliteracyinstitute.com/electric_guitar_chords_for_beginnersps1jn.pdf
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5fced2755f047.pdf
    • http://detonic-ordina.website/506257962207xoaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wodutedemozaw.epizy.com/gemasidiwa.pdf
    • http://wanudag.rf.gd/2017_r6_price.pdf
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_668b756f98c84bda88cb725337888780.pdf?index=true
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_f85785689a0c4b719612f3777402b57d.pdf?index=true
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_a78c06f5c7634b7192ca93aeea7846e9.pdf?index=true
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_721480a970c64bddb9bf7dd307a50e07.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c4041e53-118a-4d01-b8ae-c5999a310df4/80855112119.pdf
    • http://gukominutokowu.epizy.com/bubble_sheet_test_paper.pdf
    • http://mujopoweter.rf.gd/mariam_khan_reporting_live_serial_episode.pdf
    • https://uploads.strikinglycdn.com/files/5f02ee85-db23-4e9f-be15-b5ab604ceb6a/dragon_age_origins_best_side_quests.pdf
    • http://solazagu.epizy.com/cars_movie_theme_song.pdf
    • https://ab9101c8-a046-40a0-ba79-761bab9f3367.filesusr.com/ugd/61fb7c_0a6d83c7190243479e00b4592728eb3c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c65420f8-3a5d-4627-9288-39b1fde9cadd/tuzisipixapulejef.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_off0000f982.bin
16d5644223d304dcaddb98eda2af5d7efd4c1f8c694c5169d9cc1243c5570ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 5380 bytes
font_01_sfnt_off00010bd3.bin
18e8ef0d14a3f3069d4c84464c99684ea09958f40d71c6d57b445664c2c9ded1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD3 10976 bytes
font_02_sfnt_off0001313e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 4324 bytes

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