Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb84aa199a0beaeb…

MALICIOUS

PDF

76.0 KB Created: 2021-01-26 08:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2e7949ef1aa3f9def20d580730af448c SHA-1: 82bc3ddb593ff31b4e5259464c3047061d3fc374 SHA-256: bb84aa199a0beaeb0e03423603f330d841fbb1a1666e0533ae98423e61ecf6c2
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'transformers rescue bots disaster dash apk mod unlocked', likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wb?keyword=transformers%20rescue%20bots%20disaster%20dash%20apk%20mod%20unlocked PDF link annotation
    • http://xikimifo.66ghz.com/coniugazione_verbo_ascoltare_alla_forma_passiva.pdfIn PDF document text
    • http://jolowenifar.iblogger.org/cosine_law_worksheets.pdfIn PDF document text
    • http://static-start.top/infinity_war_game_download2673x.pdfIn PDF document text
    • http://salearea.pro/72949053956wu09r.pdfIn PDF document text
    • https://lezexoxutipeb.weebly.com/uploads/1/3/4/4/134462335/lufovijuralif-bikavoxutolofu.pdfIn PDF document text
    • https://dedolodaramolon.weebly.com/uploads/1/3/1/4/131455072/3938685.pdfIn PDF document text
    • http://giocodigital.fun/head_soccer_hack_ios_13kacof.pdfIn PDF document text
    • http://karnaval.host/9445371594l1eov.pdfIn PDF document text
    • http://comforfemj.fun/dr_cheeseman_dentist6pf5t.pdfIn PDF document text
    • https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/zemaxameso_delulifipegev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waxetip.rf.gd/71017222914.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/wallpaper_anime_3d_android.pdfIn PDF document text
    • http://bufalirafuma.epizy.com/contemplated_acquisition_by.pdfIn PDF document text
    • http://zepibugab.rf.gd/backuptrans_android_line_to_iphone_transfer.pdfIn PDF document text
    • http://duxurulokij.epizy.com/chromium_vs_chrome_android.pdfIn PDF document text
    • http://jiporiri.rf.gd/gafenemarumupoworavaman.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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5548 bytes
SHA-256: c5ba6586a792f4e6808e43db052b93323f6dfc0a2f77b727ce3b4da78bac633a
font_01_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 11892 bytes
SHA-256: b02173872cedcb03beb8f17059d80fc3046348ac98b054adbd0827e62dfc42f7

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