Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7312161b80f013…

MALICIOUS

PDF

82.7 KB Created: 2021-03-17 14:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e967841aad472af6f5481bf8f6f813 SHA-1: 8391975dd8cc66c6629332bf036db2802443b60e SHA-256: df7312161b80f0137dbb382cab1f75dfb4f3855eeaad9407eb7cb8c1cc0079e8
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to 'weather fronts worksheet answers', indicating a phishing or social engineering attempt. The presence of an external URI suggests the document is intended to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://ponafet.ru/wix?keyword=weather+fronts+worksheet+answers
    • http://dazixetenulega.22web.org/nojanafuzuviwidebixeme.pdf
    • https://cdn-cms.f-static.net/uploads/4503987/normal_5fd36af0bfaf6.pdf
    • http://rixerudawane.iblogger.org/8107514042.pdf
    • https://static.s123-cdn-static.com/uploads/4403408/normal_5fcf4decc1979.pdf
    • http://bedetomime.22web.org/bills_of_exchange_act_1882.pdf
    • http://jabisoj.22web.org/gubawodalinalofaju.pdf
    • https://cdn-cms.f-static.net/uploads/4449004/normal_600f766dea5e9.pdf
    • http://rapisakaxo.66ghz.com/jenomewuveveke.pdf
    • https://static.s123-cdn-static.com/uploads/4413697/normal_60058d121e459.pdf
    • http://basikoz.iblogger.org/43303374570.pdf
    • http://gosofejabe.iblogger.org/dadimatogezaxaw.pdf
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fce7a8acba85.pdf
    • http://dabejorugorazom.22web.org/weather_report_in_hucknall.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bavidoripo.epizy.com/epsxe_zlib1._dll.pdf
    • https://uploads.strikinglycdn.com/files/44333226-4ead-451f-b593-8ae5c2cfb94c/54327547478.pdf
    • https://uploads.strikinglycdn.com/files/872eb51c-27f7-4774-bdd7-2041f2ffca41/desirezerawidod.pdf
    • http://fesamemosonug.rf.gd/56746852231.pdf
    • http://minifuduredejo.rf.gd/67454934275.pdf
    • https://uploads.strikinglycdn.com/files/26c3cda6-9728-4887-aede-7968b8bbaa21/85621832678.pdf
    • http://jenikov.epizy.com/2007_honda_civic_owners_manual.pdf
    • http://repafow.epizy.com/cello_solo_christmas_sheet_music.pdf
    • http://jepoxoxe.rf.gd/carnatic_music_book_for_beginners.pdf
    • http://gaxapokone.epizy.com/how_to_connect_countertop_dishwasher_to_faucet.pdf
    • https://uploads.strikinglycdn.com/files/e068ce44-d16f-4450-a64e-22c4e4498792/govonuxipu.pdf
    • http://sodidoxab.rf.gd/59869886342.pdf
    • http://punexowimuseva.epizy.com/murarolezusupedogexarunut.pdf
    • http://morubinubifo.epizy.com/back_to_school_night_sign_in_sheet.pdf
    • https://uploads.strikinglycdn.com/files/0fa14ff4-b2a4-453e-a963-b6276c8b2784/tidifani.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_off00010839.bin
98f8b69e63ba29536b6ef3d133fb2578e1a68e55141cd40b17bf2731f5c62921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10839 4992 bytes
font_01_sfnt_off00011949.bin
38c41cf2c2e8d9067e010a45df27019277aa1f730217b60b2d8f6a50f5e8e4e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11949 10328 bytes

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