Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cf9a066b59842e…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 13:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 79074377df979943d1b7c62ac2ad35cf SHA-1: 4c24db3f17074307d66d277edb4e6c2355249be9 SHA-256: 41cf9a066b59842ed39970c8c5b746e3cd5871334bc1fbfeaaa93994d29b13c8
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://gimoguvi.ru/award?keyword=lifesmart+heater+repair+parts, suggests a phishing or scam attempt by impersonating search results. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a malicious document, likely delivered as a spearphishing attachment.

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://gimoguvi.ru/award?keyword=lifesmart+heater+repair+parts PDF link annotation
    • http://wirelessinfo.ru/180641709182thkv.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/1t5tqEf/80400492133.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/IDfijif/marvelous_life_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/ifjbjjK/drunkn_bar_fight_psvr_trophies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_603187d2b3f54.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/limyghW/fabfitfun_winter_2020_spoilers_lilly_pulitzer.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/cXic07q/water_slide_decal_paper_transparent.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/juvuraguvutoxif/anbe_sivam_movie_song_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/jolutigupapufenoxifevoga.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/vfs_global_austria_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/21490970304.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/sadness_and_sorrow_naruto_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/free_google_chrome_version_75.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/cctns_public_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/connect_plantronics_backbeat_pro_to_computer.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_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 5048 bytes
SHA-256: 3f5130ca3b59a1adb77e4afa3d1ac919ffd20e66f3cc0490baf9627d598aa56a
font_01_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 9844 bytes
SHA-256: ee256e6419bf8418973f277b24794b5f1cdbbbf5e738192d30c41bb3d688240a

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