Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce82e075d6b0e58…

MALICIOUS

PDF

89.6 KB Created: 2020-12-14 04:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e8052e916f7bec0caf8436874c6a94c7 SHA-1: c52fc19dabef89df89d03d445bfb4a625799831e SHA-256: bce82e075d6b0e5849a135b12c7a11aa9990b100c849663ae21623e5ebccb147
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector, indicating an attempt to lure users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of malicious links suggests an intent to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?utm_term=average+income+in+naples+florida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5faef05ac9f97.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f8e69fb95fc3.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/5767910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc562177d0c8f249d5ee8a2/t/5fd6988db1c3f31c7a8a57e1/1607899277922/student_teacher_introduction_letter_to_parents_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4f6c06c2ce3443352053/1606242157688/for_the_first_time_tagalog_full_movie_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd024b3fdc31513a1071aa/1606222412248/52956877809.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64e6c2e34347c70694bb4/t/5fd000f6bc75947ff0a4b6bf/1607467256254/76401948866.pdfIn PDF document text
    • https://s3.amazonaws.com/gonavo/vesefamubewakutanedojewo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ce31d26ff1194f9586a7/t/5fcdd9efeb18547f4ba5f6a6/1607326191726/govifefopobe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78c1b54d69c5962361a2f/t/5fcb032d21c0486e918d36c7/1607140144371/pijoxigipotige.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe00135147b14804f932de/1606287379627/hermann_van_pels_date_of_death.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c049c6d9645836281f45/t/5fce0c8b5d2e6f3bda6339ff/1607339148070/zuxezubofikoki.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/oecd_report_education_at_a_glance_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc578f6405d5340f3488c89/t/5fd650cd5b1f6f7539d4a2c5/1607880910349/91191816712.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001130f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130F 5232 bytes
SHA-256: b3543674e53da2e0668a1fb40d1bd13452dc67353e205ed8054c56b59ca3bf4d
font_01_sfnt_off000124bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 11348 bytes
SHA-256: a178c4c3bd360d54cc164e2577d1e69fd1572ad79d5f1ad83ac19c1b2fc7ba06
font_02_sfnt_off00014b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B36 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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