Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f62283cd75328a5…

MALICIOUS

PDF

70.1 KB Created: 2021-04-01 02:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6072299c8b8a4440e74a7f40bb39bbc8 SHA-1: d51939d0faf706007f5bb7081873702657b2b17c SHA-256: 4f62283cd75328a58911a2135c8455754b19848a91eac86a2939d602e7d29b27
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, with heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, suggests it is a PDF file. The primary malicious indicator is the embedded URL pointing to a suspicious domain, likely used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/123?utm_term=moment+format+hours+24 PDF link annotation
    • http://xoxapepagaxon.mypressonline.com/rizufikududepojutog.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/coronary_heart_disease_guideline.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/jeihKij/nipejuregoweweduwiva.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/best_python_learning_games.pdfIn PDF document text
    • https://cdn.sqhk.co/putomikoluku/hcgjzgi/3587598386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_5fc5ed22e7e7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_6015575263f35.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/idgd4Tz/sniper_ghost_warrior_contracts_money_cheat_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fd79980b2903.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/lancelot_andrewes_sermons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/kubuzadusapogefobukolefes.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/collinear_and_noncollinear_points_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/avent_microwave_sterilizer_vs._electric.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/free_company_credit_report_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/vedisesaziwupafadudogiri.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/bhakti_movement_upsc.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/yemenia_flight_626_accident_report.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/53269869593.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/jajizi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/47193898818.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/freezer_temperature_log_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/disikizonuxunebavetagis.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/datasheet_arduino_uno_atmega328.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/parentheses_in_formal_writing.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 5200 bytes
SHA-256: b1f70dd703fbfd6eb30e7e47ead8f14769d63e36baac9a00573c7498840b4d8d
font_01_sfnt_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 10224 bytes
SHA-256: 5532d02e6bd7de3cb81bb18f249de7ea8878bd4719388db770d81ed431b2fac9

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