Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5896853ded5fa6c…

MALICIOUS

PDF

109.7 KB Created: 2021-03-18 04:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51176b20a06ec9d66469a4f6b9067d47 SHA-1: 2da03c48f456883adfb28b9c18c89b305b2fdc5f SHA-256: f5896853ded5fa6c8e4b324ac571602c3c8c4e8b8f588443cb1a3b5052645f51
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to technical manuals, aligning with the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=toyota+forklift+7fgu25+owners+manual
    • http://tiriruno.sportsontheweb.net/blockchain_explication_technique.pdf
    • http://mudikovarew.mygamesonline.org/kenmore_top_load_washer_disassembly.pdf
    • http://xofazonir.iblogger.org/zamudosibovomuma.pdf
    • http://kixurox.getenjoyment.net/wapakobeneno.pdf
    • http://fetesitomer.mygamesonline.org/biology_chapter_13_review_answer_key.pdf
    • http://kopalirigel.mypressonline.com/xopubulaxebosedasejak.pdf
    • http://sejujanovemo.medianewsonline.com/employment_application_letter_sample.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://merapenerabari.myartsonline.com/how_oxygen_concentrator_works_video.pdf
    • https://s3.amazonaws.com/dovulavavo/feremibapawumo.pdf
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_18745917bc4341d78d73b464c69cff01.pdf?index=true
    • https://s3.amazonaws.com/zabejuvijolu/chrome_store_video_helper.pdf
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_dc7cceff9dca41d284a061b1adc3ddc5.pdf?index=true
    • https://s3.amazonaws.com/zuxime/kutivosivopupuz.pdf
    • https://uploads.strikinglycdn.com/files/3acc01b0-7221-40bf-99ed-d645cd0234d1/16201391647.pdf
    • http://ledukuxadom.epizy.com/everstart_battery_charger_and_maintainer_with_40a_engine_start.pdf
    • https://uploads.strikinglycdn.com/files/ab1b894b-2852-45f4-bea8-e45bb1afbb35/britax_pavilion_car_seat_installation.pdf
    • https://s3.amazonaws.com/lodazojamuva/how_many_types_of_expenses_in_business_firms.pdf
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_53ec577bce144832a387c93ff34215cd.pdf?index=true
    • http://zevesijuduma.atwebpages.com/uta_bachelor_of_science_in_biology.pdf
    • http://jilejulo.epizy.com/alarm_ringtone_song_for_mobile.pdf
    • https://uploads.strikinglycdn.com/files/632acb2c-6444-476f-ac4f-80b3425aa7d2/jojafew.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_off00016d03.bin
14af4e29a3912b316e137c99eaad3b34ebcc9cd01940e1c85e3cbdbf6b110ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D03 5628 bytes
font_01_sfnt_off0001804c.bin
a48aae23a29e299634e70612b04b098cbd0f49fb17cebc8cd027700ed926723d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1804C 12180 bytes

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