Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1c8fdb6a0678f8…

MALICIOUS

PDF

73.6 KB Created: 2021-03-16 01:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88ec5c8b4891251a8ec250466d83777c SHA-1: 5b815e6f691c1e2d717c1424876f8a16ed69a155 SHA-256: da1c8fdb6a0678f81f60e2449607c7c2f9384619178653174d24db8c12e084d3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=kanawha+county+school+2020+calendar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370529/normal_600633f461fc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388827/normal_5ffd7a6aec44f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407057/normal_60083b32c19f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6017a15aaff5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_600c19509d419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_60028a5ad4402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_6008aa2ac6f87.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://uploads.strikinglycdn.com/files/5d22ab38-07f6-4235-a57d-3656a02ec36d/where_is_the_closest_vanity_fair_outlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb55009-0163-41c6-bc20-630e88ac71eb/bhagavad_gita_chapter_2_lyrics_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/10014681521.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/paduwivezakakemoj.pdfIn PDF document text
    • http://debetofewozuri.epizy.com/chalanachitra_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07389258-8080-454c-9fb7-1bbd9dce0ba3/sewogenizigofuxejepowazu.pdfIn PDF document text
    • http://xeleleragakiji.epizy.com/heat_and_glo_gas_fireplace_blower_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/zigiwaxopixarux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cab110-db3b-46db-bf4e-1989a214f2b1/amelia_bedelia_books_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/the_barbarian_brothers_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/bilaspur_hp_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebd4c8b-4bcf-4dba-b6cb-eaff395010ca/what_is_the_salary_of_sap_abap_developer.pdfIn PDF document text
    • http://pazugovaru.rf.gd/vawux.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_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5296 bytes
SHA-256: cb84d101ae4210f19274fadd57aa4874f1b7f87eeed6e815d9a72c589aea353d
font_01_sfnt_off0000e7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D6 10276 bytes
SHA-256: e8b29cee33b382048b33031b7a9388779d00c844857a91f263d0291e1811ba5d
font_02_sfnt_off00010ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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