Malicious PDF — malware analysis report

Static analysis result for SHA-256 731c467989c130fb…

MALICIOUS

PDF

71.4 KB Created: 2021-02-21 09:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a4907fade13e1b9939e99b5247086495 SHA-1: 8936581c3ccfcf54c2a0757247b263d2c562b984 SHA-256: 731c467989c130fb4069c968b4a06f2f978aca234954b7f4e87a0d2dd0a9aeaa
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wix?keyword=cvs+blood+pressure+monitor+manual+bm+35%252F1 PDF link annotation
    • http://iqecoportal.ru/second_hand_harry_potter_books_for_sale_indiacwqhi.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/gartner_report_on_cloud_security.pdfIn PDF document text
    • http://fc-aromat.ru/omg_cartoon_20193om4r.pdfIn PDF document text
    • https://tojipojewusaw.weebly.com/uploads/1/3/0/8/130814735/vukum.pdfIn PDF document text
    • http://xumegexujarev.22web.org/wuzerososokem.pdfIn PDF document text
    • http://sufinamek.iblogger.org/b_r_automation_studio_3._0.pdfIn PDF document text
    • http://cccckkkkkdd.space/80347871218jmdn7.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/ee5d31343c1bc.pdfIn PDF document text
    • http://numberoone.xyz/enderal_bad_vibrations332mu.pdfIn PDF document text
    • http://mebelrostov.ru/11656903554c053c.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/wetevali/ae_fonts_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/ensayo_tecnologia_educativa.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/luvoradopo.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/vehicle_accident_report_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/preposition_with_sentences.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/tensile_test_lab_report_theory.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_off0000d9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 5588 bytes
SHA-256: e1e071aac6be6c32c8cc15849b3d51f2e11d3e099323e33c1bd38511e253c772
font_01_sfnt_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 10328 bytes
SHA-256: dbec975617fde3ae7a4161c08a0c16de3ee968c8ba0bec914965794ef3a5240e