Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed624ae071f541dd…

MALICIOUS

PDF

74.7 KB Created: 2021-03-09 23:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4c850c61ea1c32c08c6d87e2189509ca SHA-1: d3499abfd8df49805fac287a4966f072d3d2b132 SHA-256: ed624ae071f541dd3a7db0fea022452124ee546a2e566cca75ad5ec3e588ea41
226 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm lure. It contains numerous external links, many pointing to suspicious or disposable domains, designed to deceive users into visiting malicious websites. The presence of invisible links further indicates a deceptive intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://leonvi.ru/123?utm_term=cashflow+the+investing+game+apkpure PDF link annotation
    • https://cdn.sqhk.co/zezegawutogu/3hiC40Z/angry_birds_match_3._2._1_mod_apk.pdfIn PDF document text
    • http://managerprogram.live/guilty_crown_departures_piano_sheetm3m5b.pdfIn PDF document text
    • https://cdn.sqhk.co/dirotiweze/eoXXjVN/fonts_download_free_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/eX2vkWF/82985311723.pdfIn PDF document text
    • http://lovepositions.info/multivariate_analysis_cox_regression_spssklomb.pdfIn PDF document text
    • http://zathkatow.xyz/vubujoxudolazuwevinilubutk74uj.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/xefagivuwogosogiwavc686k.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/DJhiy3N/table_top_racing_vita_trophy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/XNchiX9/farandole_violin_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/videbamez/KV6ibKV/78367001663.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/abu_garcia_black_max_combo_academy.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/keganumerx03.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/QhbspGW/stair_runner_carpet_home_depot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_22ffdc04d8734d0c84fb7057496ff5db.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_98082fba99ef45afae2f7c6b0cc3601c.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_bbdb4c38f5bd46b79bdf5371a00efc42.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_a04f02d2238347a48a5e4fe127099cbd.pdf?index=trueIn PDF document text
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_cb3606c07c94432fafcd530e430a0145.pdf?index=trueIn PDF document text
    • http://vedixemalirugi.atwebpages.com/do_you_need_a_fitted_sheet_for_a_pack_and_play.pdfIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_086e3d4393c246ff82b04b517b1e3ee4.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_7da00f7e6ec7493a9b05a31d8286c4c3.pdf?index=trueIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_cfa104ef31274bbb9e9c30aa4c2cf8c9.pdf?index=trueIn 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_off0000e553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE553 5436 bytes
SHA-256: 7ed445276ca7e771f3c8461aae82280081da8c5637e9cfa3d5bada2ec2406e2f
font_01_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 10960 bytes
SHA-256: 141e178c9615e5dd4665422221007b28caa1fac3f2be11d42ff6027ef0826a2a