Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef11e96f90962a9…

MALICIOUS

PDF

69.6 KB Created: 2021-03-01 09:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b6cad4163259c4e275fbc647662f789f SHA-1: d769f20bcb0fb0970e3efae83d1e7a1145f7b45c SHA-256: cef11e96f90962a923bc929e367a9398bcbf7f9e85232915041e372e774dbb2f
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though partially corrupted, suggests a lure related to 'Remington serial numbers', likely directing users to a phishing or malware distribution site. The presence of numerous links and disposable hosting indicates a link farm designed to obscure the ultimate destination.

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/strik?utm_term=how+to+look+up+remington+serial+numbers PDF link annotation
    • http://sdorovie-sustavi.xyz/505643061341jjo7.pdfIn PDF document text
    • http://gopexilif.22web.org/brahmacharini_mata_hd_wallpaper.pdfIn PDF document text
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/add3f1d147eb087.pdfIn PDF document text
    • http://draiwenstore.online/story_of_your_life_lyrics_matthew_westr85os.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/hp_deskjet_2132_printer_driver_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatudoxi.epizy.com/chronicles_of_narnia_audiobook.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/lenovo_g50-80_i3_price_philippines.pdfIn PDF document text
    • http://bujoraz.rf.gd/c_programming_examples_with_output_free_download.pdfIn PDF document text
    • http://rufevobovejexe.rf.gd/shopsmith_bandsaw_parts_diagram.pdfIn PDF document text
    • http://gidiruroxab.rf.gd/hapi_drum_sheet_music.pdfIn PDF document text
    • http://xabibagozof.rf.gd/do_nissan_murano_have_transmission_problems.pdfIn PDF document text
    • http://peledopa.myartsonline.com/digitech_vocalist_live_fx_power_supply.pdfIn PDF document text
    • http://fakulolipokate.epizy.com/humatrope_dosing_guide.pdfIn PDF document text
    • http://sipawas.epizy.com/kojumavidibo.pdfIn PDF document text
    • http://bofoguvixevijin.epizy.com/sex_and_the_city_1998_cast.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_off0000d33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 5396 bytes
SHA-256: aec00abddf802864766540a51d8fa5ce79b72d2fa91d9dcea1c29e2a228df451
font_01_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 10524 bytes
SHA-256: 1e4215795f843bcada314ce200a346498c81a06fe3b8c659eab66dbbec3b2561