Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adc223f157a4266…

MALICIOUS

PDF

68.1 KB Created: 2021-03-30 00:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24346f794105b310d5f5de37d36fd392 SHA-1: 78e1c49d091c441532522acce2a593e2f8fa0b3f SHA-256: 6adc223f157a4266866388af022d121e2647c5737d8b155041d786364d0677c2
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to suspicious domains, suggesting it is part of a link farm designed to distribute malware or conduct phishing. The document body, though heavily obfuscated, appears to be related to educational content, likely a lure to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=volume+of+prisms+and+cylinders+answer+key
    • http://sputnews.com/thande_ki_botal_dj_mein8rflr.pdf
    • http://biggymstoe.com/aqa_a_level_biology_specimen_2014_paper_3_mark_schemet2sr6.pdf
    • https://cdn.sqhk.co/xubupigegi/hamidKL/bofanififuna.pdf
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/gepub_nomak_monidanavilo.pdf
    • http://samo-katim.ru/egyptian_mythology_quiz_questions_and_answers6fld7.pdf
    • http://bullbananavannaone.xyz/the_gospel_of_thomas_fully_interpreted2hmav.pdf
    • http://fruit-citrus.space/real_gem_mining_in_north_carolinae8j0d.pdf
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/1f84a3408.pdf
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/lorilafe.pdf
    • https://cdn.sqhk.co/kupejabel/doMheif/tonic_pick_me_up_crossword_clue.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a1a64cd-f361-47ca-b0a2-2b3f043dbbbe/5287539132.pdf
    • https://uploads.strikinglycdn.com/files/801570d7-89b3-48f6-9c30-6391ae5506aa/masaketitomizanifad.pdf
    • https://uploads.strikinglycdn.com/files/69086cbc-5d6f-4577-8a5d-c72b9e3856d3/kuduvages.pdf
    • https://uploads.strikinglycdn.com/files/32171916-fb1a-4a68-9ad4-3b9a03b7c871/is_there_a_limit_on_oasdi.pdf
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_1dc9a16722d747c5938d83d27a6d3a9e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d9e54ef3-3924-4b2b-818c-1099dda3157b/logulubuvofisaviwan.pdf
    • https://uploads.strikinglycdn.com/files/4f68d918-ff89-4c1d-a504-96ba62b0f5e8/62549236604.pdf
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_f41d90f862764d18a030df092f2c2beb.pdf?index=true
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_35a7e0c019c241fb95481246c1174336.pdf?index=true
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_436cf253d2f74e9a9c06beb0c6476d9f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7b.bin
8f40dc68dc2da0226fb4b02ac4e21030834045643165deaf881ad55d67d22548		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 5524 bytes
font_01_sfnt_off0000e051.bin
bd1c65c7a51617ede6e905a066f13023cb2cb62ca957ffbdd3ba4e8818cc23a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 10212 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.