Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ed570b0a140e07…

MALICIOUS

PDF

67.3 KB Created: 2021-01-15 06:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 70e21a24d9037278fe053a27d8618e85 SHA-1: 1ffe041b14913efffb54ff9064f2567b99e5f4da SHA-256: d6ed570b0a140e070daaa8d7a9e2675775e471a17ff64b675b131a730e9af5fa
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, suggests a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://trafftec.ru/123?utm_term=veithdia+sunglasses+prices PDF link annotation
    • https://site-1244485.mozfiles.com/files/1244485/vonetu.pdfIn PDF document text
    • https://site-1178820.mozfiles.com/files/1178820/business_plan_template_for_software_development_company.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/ejfyojh/first_100_words_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/iejeidA/cute_couple_halloween_costumes_pinterest.pdfIn PDF document text
    • https://site-1207652.mozfiles.com/files/1207652/yellow_belt_test_answers.pdfIn PDF document text
    • https://site-1221861.mozfiles.com/files/1221861/evolutionary_psychology_research_examples.pdfIn PDF document text
    • https://site-1172118.mozfiles.com/files/1172118/browsec_vpn_premium_mod_apk.pdfIn PDF document text
    • https://zobirifojufegot.weebly.com/uploads/1/3/4/3/134374070/pekavexo.pdfIn PDF document text
    • https://rirusiwox.weebly.com/uploads/1/3/4/2/134265342/wigore.pdfIn PDF document text
    • https://site-1176655.mozfiles.com/files/1176655/beer_pong_table_designs_ideas.pdfIn PDF document text
    • https://site-1179748.mozfiles.com/files/1179748/descargar_bigfoot_hunting_multiplayer.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/prison_break_season_6_debut_trailer.pdfIn PDF document text
    • https://site-1174928.mozfiles.com/files/1174928/34567243159.pdfIn PDF document text
    • https://site-1173660.mozfiles.com/files/1173660/buggle_blast_adorable_sweet_puzzle_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/the_donald_j._trump_presidential_twitter_library_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/dingbats_between_the_lines_answers_level_4.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_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 5300 bytes
SHA-256: 0a229364d0bedfd0524a5c99d048c4f06be4099a8ee47988b52d6320ea4368f1
font_01_sfnt_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 10264 bytes
SHA-256: eec8e865938a6dd1fd3f33a5aebb5da6ef081c53808ca6468f00d0863163ad70

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