Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5e1ff3155ecdeb…

MALICIOUS

PDF

80.4 KB Created: 2021-05-11 01:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 26c9efaea00274303af427b8e3e1b9a0 SHA-1: 22cfbee312db58bbf0700b42ecdcf433c5bb22b8 SHA-256: 0a5e1ff3155ecdeb363ace63c36d57076370431b4b4a54e505e6a3bc0a311d1a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=possessive+pronouns+english+exercises+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374181/normal_6066247328e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_6011086a4e191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416938/normal_5ffeb8624e690.pdfIn PDF document text
    • http://ygrash.website/91980284982p661d.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/all_important_dates.pdfIn PDF document text
    • http://goldstein.berlin/678385899916yf43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_6003bdc602515.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/mujosivikoxumebomumomevagav3vx.pdfIn PDF document text
    • http://geesecam.com/44296547440tu1f0.pdfIn PDF document text
    • http://magic-spring.com/lesson_plan_template_college_teacherssbdm1.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/banishing_ritual_of_the_lesser_pentagram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fceee333ea9c.pdfIn PDF document text
    • http://itfamily.info/30415953503j0ojp.pdfIn PDF document text
    • http://walletelectrum.buzz/73798316081dn4gy.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/68225791719cvfsl.pdfIn PDF document text
    • http://asta-stroy.ru/1520815237850kij.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/pdf_file_merger_offline_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/taxivivopotarevowekel.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/tekonsha_prodigy_p2_installation_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/diplomatic_security_service_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/best_cycling_computer_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/blue_jackets_coaching_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/proyecto_neoliberal_en_mexico.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_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 5336 bytes
SHA-256: cfb08d45a28d3531f75ad459abfcc4642e5cd0a3794b3ede81bee4e47fb4ca72
font_01_sfnt_off00010e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E99 10564 bytes
SHA-256: c64d268b0f826a1e352d27e3338454ec208be873139366feedd34a2f694a67b7

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