Malicious PDF — malware analysis report

Static analysis result for SHA-256 d364a7ce1853b619…

MALICIOUS

PDF

82.3 KB Created: 2021-03-20 20:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653f47ae7e74d80147a5d80f4bbd91bf SHA-1: 50653a705df66cb21460b67284b446ca4a869421 SHA-256: d364a7ce1853b619a2571d35ce0293c5c758b183e9045ec639e833d574a460d1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating an advance-fee scam lure, specifically mentioning lottery or prize language combined with parcel delivery requirements. The document also embeds an external URI pointing to 'dafemum.ru', which is likely part of the scam's redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dafemum.ru/wix?keyword=desert+twilight+2019+pictures
    • https://cdn-cms.f-static.net/uploads/4418365/normal_600f3871a8ad8.pdf
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdf
    • https://cdn-cms.f-static.net/uploads/4489240/normal_604e8dfc459d6.pdf
    • https://cdn.sqhk.co/jezaziritav/Vibieij/cfo_meaning_medical.pdf
    • https://cdn.sqhk.co/pejinijew/ZIbdjdV/the_office_quest_chapter_2.pdf
    • https://cdn-cms.f-static.net/uploads/4450042/normal_604adb9f8c8f3.pdf
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/9326998.pdf
    • https://gileledera.weebly.com/uploads/1/3/0/8/130874536/dalibetekavovigod.pdf
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/dajef.pdf
    • https://cdn.sqhk.co/zirevazul/c46fFia/dusakapekavi.pdf
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fec3a8daee13.pdf
    • https://cdn-cms.f-static.net/uploads/4420602/normal_60360f19cb376.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pejulok.epizy.com/how_to_answer_behavioral_job_interview_questions.pdf
    • https://uploads.strikinglycdn.com/files/d5eddc12-6463-4e02-8b5d-772c21db2b4e/51546178804.pdf
    • https://uploads.strikinglycdn.com/files/fc7c6eca-73f9-429f-90a5-d30f2566f708/vibewupowejito.pdf
    • http://litofafowiralo.epizy.com/76381840952.pdf
    • https://s3.amazonaws.com/dosalapasenow/asw-_27b_flight_manual.pdf
    • https://s3.amazonaws.com/ritoma/city_of_bones_series_movies.pdf
    • http://xefujifivifizu.epizy.com/67487375567.pdf
    • http://wixevudu.epizy.com/guidelines_for_asthma_exacerbation.pdf
    • https://s3.amazonaws.com/xojafemori/arcgis_10._5_full_crack_bagas31.pdf
    • https://uploads.strikinglycdn.com/files/8699b6f1-55df-49b5-995b-8bf43620cd46/marcy_platinum_home_gym_price.pdf
    • https://s3.amazonaws.com/setikizo/56580946571.pdf
    • https://uploads.strikinglycdn.com/files/c4f933ab-caa4-4005-a263-5844f029ca1e/how_to_start_my_cyber_security_career.pdf
    • https://uploads.strikinglycdn.com/files/0cdb8549-0543-44f7-9c5d-ada617aae92c/timex_t231gy_am_fm_dual_alarm_clock_radio_manual.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_off0000f325.bin
aa1bde34dddc8c7e1ead0ebbcd6d63eadea6c1d6529347b40c0e834fd9fa0410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 5224 bytes
font_01_sfnt_off00010527.bin
cce12373737cf775f88b76f7948364b840459a7a8e572966f572128b8bb39cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 11864 bytes
font_02_sfnt_off00012d99.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D99 4324 bytes

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