Malicious PDF — malware analysis report

Static analysis result for SHA-256 95984627e67d64fd…

MALICIOUS

PDF

74.3 KB Created: 2021-03-29 02:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b83acd40a84a9b1139ac01697a51993a SHA-1: ddf4565890eba8dde7786f4e2e9941395b5fe1aa SHA-256: 95984627e67d64fdf25bf44c7b954dd67e4deeed8722e3876665ceedcdeade68
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=balsamiq+cloud+pdf PDF link annotation
    • https://cdn.sqhk.co/jujejorule/jhahfCo/broken_bones_kaleo_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/tatonabufule/hbY9gdj/wallpapers_for_girls_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/Xfiat3S/4708026036.pdfIn PDF document text
    • https://cdn.sqhk.co/kewexezaviz/gjhNqha/diagrama_bimanual_therbligs.pdfIn PDF document text
    • http://logunej.iblogger.org/tipuxubomubulumutado.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/everything_everything_soundtrack_free_zip.pdfIn PDF document text
    • http://tehnomaster.net/minecraft_bedrock_pc_freevisbz.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/bW9Oiik/ates_ve_su_iki_kisilik_oyunlar.pdfIn PDF document text
    • http://uabiomanix.xyz/fifa_world_cup_songgme23.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/36159435644.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/lascal_buggy_board_instructions.pdfIn PDF document text
    • http://whalesqpa.fun/pegodibudezobutagotula97cwm.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/mean_median_mode_for_grouped_data.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/wazotojemov/navuwejudimolig.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/befofiwojago.pdfIn PDF document text
    • http://zeledevunetoxow.rf.gd/nerolelelipipamekezunuza.pdfIn PDF document text
    • http://gejujebiwibi.epizy.com/zutinijusaxizumuve.pdfIn PDF document text
    • http://nilidori.rf.gd/liwodigugovodexavor.pdfIn PDF document text
    • http://dipijiz.epizy.com/bhai_cha_bday_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/mevafaritab.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_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 5380 bytes
SHA-256: db4999bb37f4cecf22a8a9e4430e419ff847cf473a6b0eecfb479c491b454a62
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 10328 bytes
SHA-256: 0c24b87b1c9e58342ef2fd0abd6598bc6fbbb7aa49c4039b6aba4277598fb0ff

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