Malicious PDF — malware analysis report

Static analysis result for SHA-256 997412c4e58dd127…

MALICIOUS

PDF

69.3 KB Created: 2021-06-09 00:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 713e4b175c59bd0992e6efe2c9bfe5cc SHA-1: ce82811e37a88148b83b015bfad2c7f9c2a163d5 SHA-256: 997412c4e58dd127033fd9ebd6d40491b18f549685517fa7a2a718802be7029b
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body, though truncated, hints at a lure related to downloading content, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/pbw?utm_term=how+to+download+videos+from+onlyfans+on+iphone PDF link annotation
    • https://jumewabob.weebly.com/uploads/1/3/0/7/130775497/torawakobavoreg.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/4a060.pdfIn PDF document text
    • https://sefositudixe.weebly.com/uploads/1/3/4/5/134524400/zeniwiken_javeberigipup.pdfIn PDF document text
    • https://jotigafipalat.weebly.com/uploads/1/3/4/8/134896518/9550758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c138630c-f961-4c9a-91f6-d7f91cb39d36/what_muscles_work_in_jumping_jacks.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144413187/80448249754.pdfIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144898242/ultimate_ninja_impact_apk.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144437355/mxq_pro_android_tv_box_firmware_update.pdfIn PDF document text
    • http://mevuteled.pbworks.com/w/file/fetch/144546912/xusitoke.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144477093/kekid.pdfIn PDF document text
    • http://fagimox.pbworks.com/f/practice_2-1_evaluating_and_writing_algebraic_expressions_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482474ff-3c86-4a52-89ab-573f01357d44/palabra_aguda_llana_o_esdrjula.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/w/file/fetch/144426174/tercer_paso_worksheet_answers_chapter_3.pdfIn PDF document text
    • http://tijigika.pbworks.com/f/6535549121.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144898332/beetv_official_site.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/second_monitor_detected_no_signal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6910a077-916e-4b9e-a6d5-f16c4cd17d5a/49213374387.pdfIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144661827/36448459712.pdfIn PDF document text
    • http://jedilukiwo.pbworks.com/f/pefulofo.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/castle_defense_2_mod_apk_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6ab8c3-82e9-40ef-8634-8355fa03218f/libros_sobre_los_anunnaki.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/watch_dragon_ball_super_broly_english_dub_reddit.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/w/file/fetch/144751305/james_bond_all_movie_download_in_hindi_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8083c1c-7b11-4a65-a792-13d95b044030/cummins_onan_hgjab_gas_generator_maintenance_kit_-_a049e501.pdfIn PDF document text
    • http://gegoxelaw.pbworks.com/w/file/fetch/144597993/pubg_sensitivity_settings_for_mobile_with_gyroscope_code.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144721758/40487082939.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_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 5496 bytes
SHA-256: 42026b09ac64337edf3e2e35fb12debc85adf5eae6bf2a9cb7cd10d582ea5a9c
font_01_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 10376 bytes
SHA-256: c9e7a5ddb8e92756e94f32b6cface2e0bf447a0f13d2346bd5c72242e809cc46