Malicious PDF — malware analysis report

Static analysis result for SHA-256 2023018d257d15d9…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 10:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d6f1e7d76ba1c7765c6afc21f2bd2f04 SHA-1: b91bed1e3cd77b0262bebe533d8e2542c83ac973 SHA-256: 2023018d257d15d97f9a3bce32b869c75f71abfd089f04acc7e6dbd7988662d2
126 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://baarspo.ru/strik?utm_term=how+to+connect+logitech+keyboard+without+unifying+receiver', suggests a lure related to technical support or product setup, aiming to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=how+to+connect+logitech+keyboard+without+unifying+receiver PDF link annotation
    • http://monoga.space/choreographic_forms_of_dancej4flr.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/7779871526.pdfIn PDF document text
    • http://huaweistoreukr.xyz/361334379641jhsl.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/joremujuvelumijomada.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/viwajalepiwosope.pdfIn PDF document text
    • https://teliwunamadawab.weebly.com/uploads/1/3/1/3/131381891/6b9b0ba92210da.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/how_the_grinch_stole_christmas_1966_tv_tropes.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/how_to_program_esp8266_using_arduino_uno.pdfIn PDF document text
    • http://mini-cam1.club/door_kickers_apk_aptoideqqlp7.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/supakonukinukewase.pdfIn PDF document text
    • http://file-id.ru/367746708042i68w.pdfIn PDF document text
    • http://moymagazin.xyz/613672332878bj30.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/clash_of_kings_strategy_game_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedokow.rf.gd/93463475419.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/nejomiwejisudafupisira.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/proceso_de_transferencia_de_materia_y_energia_en_los_ecosistemas.pdfIn PDF document text
    • http://fidajakafitota.epizy.com/android_phone_manager_software_for_windows_7.pdfIn PDF document text
    • http://xegilejefaga.epizy.com/khandeshi_gane_dj_song.pdfIn PDF document text
    • http://gegenig.epizy.com/42364018230.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_off0000ecb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 5524 bytes
SHA-256: 7d26e3238f404b0a8d0460d7a1a7c92f51b446fbf3310d42330c403a2083061a
font_01_sfnt_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 10620 bytes
SHA-256: 60c3d10e25cc3ab914b2e41e4530d8399ad4a660e6284cc8d1848144548bca2e

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