Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ca4dea1283e1f0…

MALICIOUS

PDF

68.8 KB Created: 2020-12-07 06:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: db50a2b672b6b12a493596e18bafe0e0 SHA-1: 74c6bceb7cdf564da86ad50ca076c9bbadf5ccbd SHA-256: 65ca4dea1283e1f09d4ed4f206c01c1fbeb808dc4d673d3c6910a996a64d3456
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=the+ethical+life+russ+shafer-landau+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_5fa499891fa76.pdfIn PDF document text
    • https://tudevapibor.weebly.com/uploads/1/3/4/8/134884273/nosisamuwotebax_lozalobi_visofimenolu_zaloteli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8ceca723b23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412999/normal_5fc5a289a2088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f9577f9de35c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fcd752886b33.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/2393f93a-6fa2-4c93-98ac-cff20b0aca54/lois_from_family_guy_voice_actor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c171d4-4ba0-43ae-88ac-b21beebd76a3/ap_statistics_chapter_5_test_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7716335-5ca9-4344-b8e6-95bd3fbbf2a4/fallout_4_perfect_ending_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc570c5104edf1d779fad1f/t/5fcac4ed3d262e3e0b57e466/1607124206306/street_racing_3d_apk_mod_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a859ab79f442f22ef377/t/5fc69c0b9d7936484074cc7c/1606851601083/3088306183.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6de2be2afa34b64ab27c8/t/5fcbab02393ce473563864e3/1607183107345/cut_the_lawn_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c666546e-3440-46a4-89bc-fbe5e8ee89dc/gcsu_final_exam_schedule_fall_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e844cd1e280355d45049/t/5fc1c7453c6ccf69f39ff984/1606534984584/pampered_chef_quick_cooker_recipes.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_off0000d0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D9 5224 bytes
SHA-256: 666a26e006693d218197df17333ec725595d5bd9677223df7d059d05f7ea0742
font_01_sfnt_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 10464 bytes
SHA-256: 132d41b72391db4fa9b17f09812c9dd7393fdd3b7df4e14de8d804e0b349a395

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