Malicious PDF — malware analysis report

Static analysis result for SHA-256 973023052be9556d…

MALICIOUS

PDF

92.8 KB Created: 2021-01-26 05:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 19cbe9f81321e03cbb28464144060b9b SHA-1: 76f0e832d97a098a0d002679c0d20f979d82b408 SHA-256: 973023052be9556d002d20a100e93a98f10960d405f93148c3dafa85397917b6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a lure to download further malicious content or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/123?utm_term=tecnica+de+observacion+segun+autores PDF link annotation
    • http://hydra.moscow/97550970605yz5qj.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/a0hayjd/othello_plot_summary_act_3.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/jhZgghh/best_2_player_computer_games_free.pdfIn PDF document text
    • http://arfesopt.com/7551825365cz847.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/emJ3hiN/kexapomizifeli.pdfIn PDF document text
    • http://idealica-official-it.website/telugeladamimerezefux6mmy.pdfIn PDF document text
    • http://repochka.site/freewing_a-_10_thunderbolt_ii_twin_64mmdr8xg.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/likert_scale_questionnaire_template_excelwvx33.pdfIn PDF document text
    • http://strahuemsya.info/sokerivotuguw4ploj.pdfIn PDF document text
    • http://universityru.fun/17698785595dwdym.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/gfiihbv/84375698827.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/heDgeu0/download_city_mania_town_building_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/abjghc4/61444605164.pdfIn PDF document text
    • http://gakmancreatures.ru/goal_zero_flip_24_power_bank_reviewjkd78.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/jg2Z0gj/smart_balance_butter_sticks.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/Y8iBxNk/rorufolutugegomuwulera.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/QjiUche/diversify_our_narrative_petition.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/itghqAz/84618197386.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/chchage/11_stone_in_pounds_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/cNshfjg/muzorebakasuxekifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotenekopibijo.epizy.com/behringer_xenyx_802_mixer_service_manual.pdfIn PDF document text
    • http://mevonaku.rf.gd/the_sea_poem_questions_and_answers.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_off00012c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C52 5224 bytes
SHA-256: 52a99dc5b1610b66cc33b2e7f1a49f786ff07b0306bbc0ac3e3602fbd2fa789b
font_01_sfnt_off00013e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2A 11448 bytes
SHA-256: 331c273a3566ef763f881ed021726227e46b6204527a01fb664f6812b5d92576

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