Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f9d75d87954a0d…

MALICIOUS

PDF

74.3 KB Created: 2021-02-26 18:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6edccd1fdbfaab248628ec1060ef23e7 SHA-1: 870b37b62ee31d12e4afc3d6c7faed2009847341 SHA-256: c1f9d75d87954a0dcbb7e53970d608056c7e1dfe5b6f22e565510f0141ff185e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain metadata related to search queries, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=math+nation+geometry+section+8+test+yourself+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451019/normal_602da05a47490.pdfIn PDF document text
    • http://homebig.space/ferdinand_movie_questions_and_answerswb613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_6012b1807d0d8.pdfIn PDF document text
    • http://sy0n.icu/wixixasusunjj802.pdfIn PDF document text
    • http://kengoru.space/algebra_equations_worksheets_year_9kvzmq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/figidireki/happy_wedding_anniversary_song_audio.pdfIn PDF document text
    • http://noworevapetero.epizy.com/the_crimson_crown_swallow_the_sun_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/rental_contract_template_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/how_to_delete_devices_from_kenwood_dpx501bt.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/minecraft_vending_machine_mod_1._7_10.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/38396150442.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/dezopuronesa.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/25299461119.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/chapman_university_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/comment_couper_une_page_en_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/basic_networking_concepts_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/jexapaziduvufugufivevil.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/curved_surface_area_of_cone_worksheet.pdfIn PDF document text
    • http://nokumew.epizy.com/44538539424.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 5568 bytes
SHA-256: 27d0304d5327143cca1455be12728078fc4a431a4d5d7329bc03d46f9b920064
font_01_sfnt_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 10264 bytes
SHA-256: 96bbb6c904f144383e626156c12616280511f2f11e4ed1f34ca45fa73b10b1d7
font_02_sfnt_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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