Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b8ac8b8f54b07d…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 13:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b0c75542cd990ca5a0c7ad8cea919fc SHA-1: 6ed56976d8c11fddb119d5361fcd2dd7f4db2d48 SHA-256: 30b8ac8b8f54b07d05a0ca64aa3c6af02f0fc3664c587981856f62d1d91c8cf2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL designed to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a malicious site, potentially for credential harvesting or further payload delivery.

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
  • 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://leonvi.ru/strik?utm_term=how+to+set+tablet+to+save+to+sd+card PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6060411716e1c.pdfIn PDF document text
    • https://tumugisoluxadez.weebly.com/uploads/1/3/4/6/134601474/pitokolex_sajisigu_wosupovutozik.pdfIn PDF document text
    • http://sakepugikunon.mypressonline.com/35853092458.pdfIn PDF document text
    • http://waxokuvinati.iblogger.org/active_directory_best_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/xhgKghh/blaze_monster_truck_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/imzWaDL/6268082502.pdfIn PDF document text
    • http://jerugujekema.getenjoyment.net/pezametukudaregewodagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_60208c0e23238.pdfIn PDF document text
    • http://tuforuj.mypressonline.com/xibirenufowakoz.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/3689489873.pdfIn PDF document text
    • https://jabasamivesapev.weebly.com/uploads/1/3/4/0/134041177/ratobej-xinib.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/grooving_operation_on_lathe_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/GgfT0NY/5152374599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449774/normal_5fc7afa8a5cdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xarozitapakegur.epizy.com/keep_track_of_spending_template.pdfIn PDF document text
    • http://rofivotika.rf.gd/physics_formula_book_for_neet.pdfIn PDF document text
    • http://dopovis.myartsonline.com/77421820933.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/tissot_touch_solar_titanium_sapphire_crystal.pdfIn PDF document text
    • http://lufirapubabe.epizy.com/identity_theft_movie_parent_guide.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/sovufegunavas.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_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 5184 bytes
SHA-256: 8e536a0537cc5f6bb7d8aad077ef062460a000e267f8687fcfc8a8bb507307bc
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 10752 bytes
SHA-256: b51405b91889a617eb7741fde95e8c2793feaf0495a0f2b460603767bcadc0ca

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