Malicious PDF — malware analysis report

Static analysis result for SHA-256 63239208b1e5fa50…

MALICIOUS

PDF

92.4 KB Created: 2021-02-24 23:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 501a2384cd19c4e7ba19022b40c17861 SHA-1: f9acac13d087b61a0cca9f6387b2b6268b688f8a SHA-256: 63239208b1e5fa50a95708942369022f0943866872b022d6e580effeec3f82dc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate malicious intent.

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://seumenha.ru/123?utm_term=how+does+energy+travel+in+an+ecosystem+brainly PDF link annotation
    • http://poopo.ru/unicornio_para_colorearejo68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fd2702b0c81e.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/fOuhcki/xidanizigepulovu.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/jhihacF/tumblr_backgrounds_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/gjgjidO/film_quotes_about_love_and_marriage.pdfIn PDF document text
    • http://chambrehub.xyz/tronicaltune_plus_set_type_c_chrome_strat_styled9ivc.pdfIn PDF document text
    • https://jopixumux.weebly.com/uploads/1/3/4/7/134734794/gugexusaxasetitum.pdfIn PDF document text
    • http://meetsucre.pro/capacitive_coupling_ethernet_transceivers_without_using_transformers1t063.pdfIn PDF document text
    • https://terifebi.weebly.com/uploads/1/3/2/8/132815785/valudatemenove.pdfIn PDF document text
    • https://tunoworuv.weebly.com/uploads/1/3/4/0/134017870/bumifewevobofume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390323/normal_6007b528c6e73.pdfIn PDF document text
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/be960b50e9.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/jdSjjbM/safidolitutibefafib.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/how_hard_is_it_to_set_up_a_wordpress_website.pdfIn PDF document text
    • http://gobigs.space/commandos_behind_enemy_lines_apkixa2i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dozuga/jhumka_bareli_wala_audio_song.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/domufi.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/dutch_grammar_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/best_annapurna_circuit_guide_book.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/76424506810.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_off00012b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B27 5616 bytes
SHA-256: ef0c46460dd3f9f0ca16d86cca0e4b075d1f16311f9750401e107d9cc96daa86
font_01_sfnt_off00013e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E41 11032 bytes
SHA-256: 852974f92b455d3602f56e969a8cc5529b5a7cb4078dbc83b446d25b8c0f0213

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