Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba910deb9c36242…

MALICIOUS

PDF

79.9 KB Created: 2021-02-27 14:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d2c5fa5c4580ddff5a11131307a72c6f SHA-1: 58e6686e48d2b3131b8683c254caa011282fcf7a SHA-256: bba910deb9c362429e4d7e22f5c458e3286fad5eb71c815178f07b2516f18cd0
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and one specifically mentions 'bonk.io unblocked games' in its query string, suggesting a lure for potentially malicious content or phishing. The presence of external URIs and the link farm heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=bonk.io+unblocked+games PDF link annotation
    • http://wivuperafuzo.mypressonline.com/nediwozarotokenera.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/jhhjfgc/77378373596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418401/normal_5fce5e1bda645.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/l1Oghhf/82339391081.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/hgiiLfr/58501344435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_60101f853e9ae.pdfIn PDF document text
    • http://teaitalis.space/venn_diagram_lesson_ks2tcwt0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479439/normal_5ff760c96aa89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379362/normal_5fc7107c4e9ff.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/idHUShc/yellow_wallpaper_for_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/mafulavet/aqhangh/vixoditadidujegotegudo.pdfIn PDF document text
    • http://sununetapa.22web.org/cartoon_full_movies_2018.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/lilakerogiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/X5qidjc/download_galactic_core_live_wallpaper_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/wofakakisuvaravorobivazo.pdfIn PDF document text
    • http://bewaxupu.rf.gd/principles_of_cost_accounting_16th_edition.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/47459684177.pdfIn PDF document text
    • http://xezabesazigida.epizy.com/what_is_the_one_punch_challenge.pdfIn PDF document text
    • http://jepisaf.epizy.com/pajinob.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_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 5448 bytes
SHA-256: f6553ad1f1186e738fd416cca95378dd60c34c4c321d591d3302ccfc3a9d3f5a
font_01_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 10788 bytes
SHA-256: 21e6c52c2f1d98f52a94c826b3f441457de52082961faeda766a623b29f1514f

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