Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b01c30bd37c84b…

MALICIOUS

PDF

77.4 KB Created: 2021-03-10 17:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 795ff35b28501f7d7aaef4e811f49297 SHA-1: 242b2be8e39ff47c7de4ce2b2c1e504a4326dd59 SHA-256: b0b01c30bd37c84b2c4c06ed97aa4bc0f7d9ae83fa76cfded38e87a00ae4dfae
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'midufefew.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a calendar, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://midufefew.ru/wix?keyword=calendar+december+2017+printable
    • https://cdn.sqhk.co/lojosewude/hegcMgd/mudupuxi.pdf
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fe3e599c54df.pdf
    • http://nuwevabufa.mypressonline.com/nucleophilic_substitution_and_elimination_reactions.pdf
    • http://tetoxukipim.getenjoyment.net/gutawebunaguledoziram.pdf
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5fce7cd5b56e3.pdf
    • http://jovopomutulilo.medianewsonline.com/pizowipa.pdf
    • https://cdn.sqhk.co/visobipibe/Xjiojjh/introduction_to_business_management_king_s_college_london.pdf
    • http://dizurexemubegog.mygamesonline.org/26578567870.pdf
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5ff62b95d233d.pdf
    • http://rexevivejegox.scienceontheweb.net/videjubug.pdf
    • https://static.s123-cdn-static.com/uploads/4424982/normal_600896196ea52.pdf
    • https://cdn.sqhk.co/wuwexosul/hfniehe/rigexolopozefu.pdf
    • http://tofoxewesaxizuz.mywebcommunity.org/greek_mythology_symbols.pdf
    • http://bumasujofoj.getenjoyment.net/focusrite_scarlett_solo_ableton_live_lite.pdf
    • http://bumasujofoj.getenjoyment.net/zabojefajolivuratepadom.pdf
    • https://cdn-cms.f-static.net/uploads/4473035/normal_601251197ea11.pdf
    • https://cdn.sqhk.co/gukokefa/Wllhegd/final_fantasy_viii_walkthrough_guide.pdf
    • https://cdn.sqhk.co/fepexeguma/hjjajjE/hand_tossed_vs_handmade_pan_vs_brooklyn_style.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/42b0c523-0414-43ee-890b-d32f86133d60/how_to_make_profit_on_forex.pdf
    • https://uploads.strikinglycdn.com/files/225fd211-a4e4-4453-b5ba-8c1137f379c4/dell_precision_t1700_drivers_windows_7_64_bit.pdf
    • https://uploads.strikinglycdn.com/files/3f6afe02-522f-4b4d-bae2-a597219d30d3/places_worth_stopping_and_jotting_anchor_chart.pdf
    • https://uploads.strikinglycdn.com/files/84a9395d-c3e1-48d1-810d-94148d59b82c/35216576998.pdf
    • https://uploads.strikinglycdn.com/files/1f03e429-c91b-4be5-b9b0-aa615429f26d/genesis_chapter_6_verse_4_meaning.pdf
    • https://uploads.strikinglycdn.com/files/4bbe9a2d-379c-43e4-ae89-9bb9fa043d18/best_movies_like_fifty_shades_of_grey.pdf
    • https://uploads.strikinglycdn.com/files/e1485ea6-c317-4dfb-80a7-937909da6114/john_deere_4045_engine_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/1e267b21-a66d-475e-9978-e8f7b248b9a2/primeros_auxilios_psicologicos_curso_uab.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_off0000f18c.bin
239b744f7b683d2281fd3913532f482e93b5b36ad4fb8f281c1e55a6d0080fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 5492 bytes
font_01_sfnt_off00010420.bin
08a993db3eae5c6e1cca14b4a85bdb8463f125daf687adb6dba2f9a241e7646a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 10408 bytes

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