Malicious PDF — malware analysis report

Static analysis result for SHA-256 c717ad5e7db913bd…

MALICIOUS

PDF

73.7 KB Created: 2021-03-08 00:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 197afd684be14fa5050cead26a1517f2 SHA-1: 11e34f68f413b4825a08355868a00be5f95dafa5 SHA-256: c717ad5e7db913bdd358742ba9258435a414205253411b6a55af460285fc574a
96 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains an external URI pointing to a suspicious domain, likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'imaginary number worksheet answers', which is a common tactic to trick users into opening malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=imaginary+number+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/lididiregi/kZ3gi6o/badass_samurai_quotes_in_japanese.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/ifxibhi/laxokizegutakob.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/ciiUhgt/jowow.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/RhecPib/mokani.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/ixjfyji/top_cashback_mobile_phone_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/jdiegef/3468181760.pdfIn PDF document text
    • http://dezurifu.iblogger.org/ice_cream_cone_coloring_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/XBGjiij/1820801545.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/ijgjdqO/koxobomubume.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/digPYcY/torudojonufuwevu.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/3hejtj1/bloons_tower_defence_5_hard_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/bedipidis/j6icjb5/topaz_artillery_fire_control_system.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/dlaHicX/wirufexusatufememon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viziwoje.rf.gd/whirlpool_wtw4815ew0_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e53cfc-afed-4f25-af11-ace5f30cf9c6/what_animal_represents_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c4df02-8f4f-4008-aceb-7b121fe1fb71/pinijidosiranojexo.pdfIn PDF document text
    • http://wavopomop.rf.gd/33416845404.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/gesubijabereseve.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/famous_scientist_and_their_inventions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0b9df3-3e7d-44d6-a06d-686ed1ff0d23/how_to_test_cranial_nerves_2.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_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 5404 bytes
SHA-256: 1d3049d10c23f6cb503e359089aeb3de440363ba707f15a7a9ac96b01a24dae1
font_01_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 9856 bytes
SHA-256: b8902fb195ad439b0f16d6c3e9a65f64e49d5169faf88f460951d56795ab1b69

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