Malicious PDF — malware analysis report

Static analysis result for SHA-256 9474940a515fe676…

MALICIOUS

PDF

83.4 KB Created: 2021-03-20 10:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 922637ea5512e64dd7d949561bf43cb5 SHA-1: 20150d87bce5aa248963ea7064d8980b7658e671 SHA-256: 9474940a515fe67674f74d60a634d47d76c4119dd8665249124c33ea319bd77c
96 Risk Score

Malware Insights

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

The PDF document contains embedded text related to 'Thermador gas oven not heating properly' and a heuristic firing for an external URI pointing to 'https://nipisod.ru/strik'. This URL is likely part of a phishing or scam attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://nipisod.ru/strik?utm_term=thermador+gas+oven+not+heating+properly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462974/normal_5fe98d7bd529c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fd646b76f90d.pdfIn PDF document text
    • http://fiwudowa.22web.org/what_is_the_history_of_job_in_the_bible.pdfIn PDF document text
    • http://kebuwakuje.medianewsonline.com/complete_list_of_english_spelling_rules.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/cerita_rakyat_jawa_timur.pdfIn PDF document text
    • http://kosolibanun.iblogger.org/41616887684.pdfIn PDF document text
    • http://rijogemas.iblogger.org/best_non_canon_star_wars_books.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimawawasero.onlinewebshop.net/difference_between_archaea_and_bacteria.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/5163362940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de3caa2-fcdc-4f32-8641-b60be5350afa/29710423019.pdfIn PDF document text
    • http://famomijis.onlinewebshop.net/pdf_to_dwg_converter_online_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b503cb0-705f-4914-9402-0664096cab5a/63737742983.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/kefodipiliveto.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/classical_guitar_lessons_seattle.pdfIn PDF document text
    • http://sudogirelokuf.epizy.com/jezedi.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/5219008853.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/guide_du_routard_cambodge_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30feefe4-c96d-45e6-be1a-5abc95dbf6e1/ashton_woods_austin_design_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/97068464081.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/the_ascent_of_money_episode_1_transcript.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 5484 bytes
SHA-256: 932dcfa8409d0dcc72437d49cfd83082a6e717501782836d417023b4d2478f92
font_01_sfnt_off00010590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 10508 bytes
SHA-256: 0d1f428ee7feed1a01b577f18cdeefa0b36cdb389f95b63b1436d4cd94523dbd
font_02_sfnt_off000129c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C5 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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