Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7f1ed4a2c51da2…

MALICIOUS

PDF

77.9 KB Created: 2021-04-10 19:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 13fc432874fa1fa3aaa39132088de0a2 SHA-1: 290cc4fc5da2d9ec91b202a102a3b9aa748229b7 SHA-256: 7f7f1ed4a2c51da25583678c92fe1a493ffc7f7336013fb613f25bfb971da342
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'fokemale.ru', likely serving as a lure for a phishing or scam operation. The document body, though heavily obfuscated, suggests a deceptive pretext related to dreams to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://fokemale.ru/strik?utm_term=que+significa+so%25C3%25B1ar+q+anillo+de+oro+se+rompe PDF link annotation
    • http://kugetogegus.iblogger.org/75451256348.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/dd2adf2d-2ae6-48f5-84ce-e1b8f4021470/what_are_the_negative_effects_of_modern_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/10653442308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1366d51b-c473-4102-afd3-6a1ce78e5a08/selenium_webdriver_javascript_automation_for_beginners_2019.pdfIn PDF document text
    • http://pijefekogol.rf.gd/auxiliary_verb_exercises_with_answers.pdfIn PDF document text
    • http://timojakizufijad.rf.gd/30653215649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee24c304-2fb2-44f5-afa5-927838b03b69/69665357149.pdfIn PDF document text
    • http://durozebexonadop.rf.gd/54302690086.pdfIn PDF document text
    • http://vanepozimor.rf.gd/rinetalesirer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbdcf85-6a06-4c80-8b6e-18997a38fa99/91114132452.pdfIn PDF document text
    • http://dafunidubavilo.rf.gd/zejakulojobenurewiwiwutuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d37b76-34e9-45be-a1aa-7b7c382b531e/66934003244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ad0128-05b4-4637-a125-5f1f8e571460/brother_hl-l2380dw_connecting_to_pc.pdfIn PDF document text
    • http://duposul.epizy.com/dorney_school_ofsted_report.pdfIn PDF document text
    • http://mutojux.epizy.com/5345592338.pdfIn PDF document text
    • http://bunedupa.epizy.com/corporate_social_responsibility_jobs_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/40005024371.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/13167429808.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/20758305823.pdfIn PDF document text
    • http://dafolilujoxupan.rf.gd/full_form_of_computer_parts_list.pdfIn PDF document text
    • http://fotafufoka.epizy.com/project_risk_management_pmbok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d8fa56-d7a9-40a3-8b9e-047814d12f9c/56348211807.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_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 5876 bytes
SHA-256: 0faf38b6d1fb72f7c2d2d94da5a478d14e01aca0e2cd5bd57f8da839a6392b4f
font_01_sfnt_off000103a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A0 11184 bytes
SHA-256: 599450c232213c4c795083b2942c08a063d4b7ca1935481b5029297b2d854d74

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