Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb5d16f382af850…

MALICIOUS

PDF

72.3 KB Created: 2020-12-01 07:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 05a6503fa23743dbb8ca751919ac0303 SHA-1: dbb2396a6a39e612b585bc6cff5465ba62297ae0 SHA-256: dcb5d16f382af85097e7ab6d65bb59cde736c1c3b3b6ff6923407a586d21794e
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-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://trafftec.ru/123?utm_term=steampunk+weapons+dungeon+quest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452861/normal_5fad78868f243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f96169d4a285.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/muvimebagujetoja.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/8365352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fb2d6c673fd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf480cc750a3b5a055283/1606218881115/harvest_intermediate_chinese_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/aha_new_guidelines_for_hypertension_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da926663-d154-4ca2-95e5-be2d2292f308/the_little_blue_book_of_marketing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8278a03-6ebc-46b8-9eba-78b98c41d9b3/47835752475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27efe7d9-7a76-420a-a94d-65f6dafb47c1/todemugumubitizajilikonuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf78df3de5e49b529ec0d/1606285199095/guitar_hero_iii_legends_of_rock.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/pemavodedu.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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 5536 bytes
SHA-256: 49b17f9b1b81ee3105fe17e11091351124903300d5a117c55d81937a6dafa7a3
font_01_sfnt_off0000f246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF246 10004 bytes
SHA-256: 273fa4a1b148061ee691d445fdec629817315f8dcccf4c496599f09fa2fd5c4d