Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0c867192eac06d…

MALICIOUS

PDF

80.9 KB Created: 2021-03-31 03:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5d88f15d81581f277007e76d6674cad2 SHA-1: 90679ed76cd4d8692f0a4080c9a32fd4f2f563f6 SHA-256: ae0c867192eac06d80155f6411e6e73c19b2e7c74dc981dbabf303e4748d392b
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/123?utm_term=emoji+animated+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369499/normal_6000ed31762b1.pdfIn PDF document text
    • http://memaruve.22web.org/axis_bank_personal_loan_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_6038e5b7aacc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464869/normal_60088d255d054.pdfIn PDF document text
    • http://tokujanorix.iblogger.org/24126607007.pdfIn PDF document text
    • http://vuzeliligovitu.iblogger.org/gefugagutelo.pdfIn PDF document text
    • http://fakaremun.iblogger.org/53765660486.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/ejgoggv/hobby_lobby_parker_co_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/au29E8l/fireman_sam_costume_diy.pdfIn PDF document text
    • http://milixowegamu.22web.org/jugusavojavotaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/torevebeti/onojgVP/joferexo.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://uploads.strikinglycdn.com/files/eed738ca-6ade-49f4-9f77-9aac686510b0/91037157041.pdfIn PDF document text
    • http://bevewuzetop.epizy.com/chalkboard_normal_font_free.pdfIn PDF document text
    • http://jumejivoreka.rf.gd/how_do_you_set_time_on_a_armitron_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fd2167-10dd-40a0-9b28-014741159ec7/what_are_the_4_personality_theories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82af6bd-4f52-4cc8-87cb-e7fa4c4f1ff8/59802388696.pdfIn PDF document text
    • http://gesasodalunaka.epizy.com/decimal_place_value_and_value_worksheets.pdfIn PDF document text
    • http://gujomodezeroj.epizy.com/zibukanowaraxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2620f76-088c-4482-9c57-193838abf5ab/how_much_oil_does_a_lexus_rx_350_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737224ea-8ae6-4767-883b-d80f3e918e2b/firex_smoke_and_carbon_monoxide_alarm_beeps_twice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcdecba3-6703-404b-9881-369663153188/65187799446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6dcb21-7422-41d4-bad3-bd4ee541d55e/how_to_replace_stihl_blower_pull_cord.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_off0000f2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BC 4544 bytes
SHA-256: c7a9e1eb5d0c078dbe5b02fb1e6ed15c68c0277fd2867ecf9fa4a422e7667e10
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 11356 bytes
SHA-256: f2bd0c39ad6c3578477691fc56420123d52689c2e1c6bc3131c0755b1bb4822d
font_02_sfnt_off00012856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12856 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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