Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c590d5b31f3f66f…

MALICIOUS

PDF

67.9 KB Created: 2021-01-09 18:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fcbdf46a8461a8b1a82ea603121ad7e3 SHA-1: cc8ffdae37d4e603318879d383fdc1f73e099790 SHA-256: 9c590d5b31f3f66fd43641d0102e82617264b235320a373c0c033ce99de91e94
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 0.9998

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://traffine.ru/aws?utm_term=fuse+odg+azonto+mp4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484635/normal_5ff84c67f3e3c.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/jdMIQa8/technology_in_higher_education_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/dunenilufa/UqqPDhg/tulobikunonu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5ff1e829a363e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f9960f8f2a83.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/mulerux/28082056058.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/irobot_roomba_model_650_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/toluporupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ba6b24-be57-41a2-b662-855f9e3a9e7d/18353183778.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/computer_password_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e695a65-bb62-440b-a0f3-294367ba0321/biwokexafenavexikazavizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7296bb27-efcc-4eda-904d-db435919fcd6/investigacion_cualitativa_segun_autores_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/college_acceptance_letter_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009e3c9d-f24f-442e-ba70-dc4908561c7c/83944859367.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_off0000ca95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA95 5244 bytes
SHA-256: 2e21597b21d505560f48acafabf38a4f1d1a82c3c99740fad0ea066ce952a684
font_01_sfnt_off0000dc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 11288 bytes
SHA-256: 6b24206c68d85090b2cf596796190de8023bdc835d9eba36063f24519b611f98