Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bce0f785299f99…

MALICIOUS

PDF

80.1 KB Created: 2021-03-29 16:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e15aadabc8679b69a94d4092f65bc164 SHA-1: 5267c76c82045180aab745c13283185a3468a52c SHA-256: 62bce0f785299f99f76cca4153b40ad61af2d9f7cb1ff6a8a1af6f1ea81f027e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/wix?keyword=persona+5+judgement+arcana PDF link annotation
    • http://reduslimitaly-official.website/fallout_4_female_deathclaw_modb2z5j.pdfIn PDF document text
    • https://suretilan.weebly.com/uploads/1/3/0/7/130738944/musevexizizal-mubasam-bosolekiv.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/4744976.pdfIn PDF document text
    • http://onlineeshop24.xyz/35335872657z1va6.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/c95f7.pdfIn PDF document text
    • http://shopeuro.pro/monster_manual_3.566sjp.pdfIn PDF document text
    • http://sallely.xyz/motorola_astro_25_portable_cps_softwarew4jo1.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/find_per_capita_real_gdp_in_each_year_and_fill_in_the_table.pdfIn PDF document text
    • https://naxigekaserudo.weebly.com/uploads/1/3/4/6/134644932/fejobabuge_bilonagolaj_gowude_felifotezumofe.pdfIn PDF document text
    • http://raisinshq.club/korumufasekomogeloxubap94jqv.pdfIn PDF document text
    • http://fufoxewiwiv.iblogger.org/43393296641.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/watkin_history_of_western_architecture.pdfIn PDF document text
    • https://panofokolonap.weebly.com/uploads/1/3/4/4/134483377/7968500.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jirofoxijesev.epizy.com/topikuporepa.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/french_present_tense_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfb4fa6-9d6c-470f-80da-d3da899bc3d6/how_to_do_seo_in_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0c3c7e-b98e-4c62-b84f-d36a2e7c7c54/35505937320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ac090b-2a85-41bb-9d6a-ebc3ca235174/worlds_together_worlds_apart_concise_second_edition_volume_two.pdfIn PDF document text
    • http://dolaregasa.epizy.com/2006_nissan_altima_owners_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/35185611274.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/executive_summary_for_monthly_financial_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/combustion_analysis_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/anari_songs_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d107a5-6ac1-42af-9c03-66c2be1d46c4/59196753065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4460d8db-c596-41df-ab7c-c8c2e29e297b/what_is_the_purpose_of_avro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 3420 bytes
SHA-256: 17928dc6000cc47b399115b088796f92307a52032b465c35e8c3bff87db0fd8e
font_01_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 5428 bytes
SHA-256: 0778c0ac878e89162961d1361786560d14424e8f291a2763ae3f9631ec02e7b0
font_02_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 11104 bytes
SHA-256: 93c44f8dffe6f8fe9c7c636e7d27616e0bd8d6f2686d756384d0862257398fa1