Malicious PDF — malware analysis report

Static analysis result for SHA-256 997dc789d1601c67…

MALICIOUS

PDF

71.8 KB Created: 2020-11-11 04:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c44ca573a364ae737514b405316faa43 SHA-1: 2a4c25cd15d3b8bb1e0ba1d0edb72ec29a084ee0 SHA-256: 997dc789d1601c671bc5bb1f84ed38e6b5d912121e9b263560e1649d847d624a
96 Risk Score

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://trafftec.ru/123?keyword=types+of+mixtures+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8948e00b107.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/davamev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fa15279a0cd2.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/puludoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e428a7a6-db56-46ee-92e4-fb91b73f8c18/pixapimarurunu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bhagavad_gita_quiz_questions_and_answers_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/98740073657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab19255-adbc-4ca9-a85d-49a490aaf394/44868055727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66695eb7-ff97-48d7-a657-6f440aa955cd/nifijixojeteruwasetot.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/ligado.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/wuxudupuvajudux.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/41_chevy_coupe_rear_suspension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536dd9ee-fa88-4b77-9ede-a18df963205c/the_figure_represents_the_overhead_view_of_a_deck_surrounding_a_hot_tub.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_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 5312 bytes
SHA-256: acb8540c780b23e3750cbc9b54d90589a6ba072b93f893de44c680f366795626
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10796 bytes
SHA-256: 1dda71a5c9caf00588d51b92f72fc15e1a8916f3865335f9d8fdd216057e6e6c