Malicious PDF — malware analysis report

Static analysis result for SHA-256 977fb2b4cdb6285f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-11 01:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c44f0024bfa798107637c9146032bb16 SHA-1: dcac4af58267b2ad713888ed3a0f7d27acda9aad SHA-256: 977fb2b4cdb6285f310262a64cb0817e0026d4910171edc1859ea6b6d96991d1
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the phishing lure.

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://ponafet.ru/wix?keyword=21st+anniversary+gift+traditional PDF link annotation
    • https://cdn.sqhk.co/dodanadofu/hdhficL/35398760123.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/ejAMjhq/warframe_dark_split_sword_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/5kicigm/furniture_modesto_ca.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/sugezukokagupifodut.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/microsoft_onenote_manual.pdfIn PDF document text
    • http://jobauthor.online/manual_radio_reloj_sony_dream_machine_icf-c218btych.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/polytheism_vs_monotheism.pdfIn PDF document text
    • http://kulinarny.site/what_time_are_the_championship_football_games_tomorrowdlfxv.pdfIn PDF document text
    • http://ygrash.website/91980284982p661d.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/hfgcKje/xopujovumofixoziru.pdfIn PDF document text
    • http://kajuzumanaz.sportsontheweb.net/canadian_citizenship_application.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/hgxgidi/95533640969.pdfIn PDF document text
    • http://daddytestit.xyz/born_in_blood_and_fire_4th_edition_chapter_2_summaryvr0wg.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/0ih8Uij/evertale_best_rare_characters.pdfIn PDF document text
    • http://getcabinets.xyz/asmaul_husna_adalah_nama-nama_baikbczii.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/5182cf7f-60c7-41b8-8ab8-7a3a190274e5/what_does_20_30_and_20_40_vision_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/microsoft_word_cover_page_templates_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbee936d-be5f-42ce-96d2-555db79fa608/bowegetodofosakagobaru.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/aqa_maths_gcse_past_papers_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/31268841072.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/80340571690.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_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5328 bytes
SHA-256: b929100afd137b3108318632d30e626bc478bd985b0146b65504e833969aebbe
font_01_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 10084 bytes
SHA-256: d79f17d2b8af4a12f28e5307bc80e5af6c05671d6658282cbecd75a9dea4e43c

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