Malicious PDF — malware analysis report

Static analysis result for SHA-256 e129542176dff563…

MALICIOUS

PDF

81.0 KB Created: 2021-03-29 15:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 77ebc46a25cd20e8b6ed0ee39c4b7a99 SHA-1: 28dbad8dd5153cda95bf3c1d994cbdc183413cab SHA-256: e129542176dff56367d342c407fd5f0950dc22ebab7fa3df4508ada6fe5b6fa0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, contains references to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://resalured.ru/strik?utm_term=how+to+change+batteries+in+coleman+led+lantern PDF link annotation
    • http://gekalam.22web.org/tabobuvemexiriziloximewab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5fe340848cacd.pdfIn PDF document text
    • http://kavojunulibugo.22web.org/is_the_dyson_airwrap_worth_it_uk.pdfIn PDF document text
    • http://gotesukig.22web.org/betakutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5fd7f395b4b2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382420/normal_5ff2c383e34e3.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/metabolism_of_carbohydrates_lipids_and_proteins.pdfIn PDF document text
    • https://cdn.sqhk.co/kesavaki/jcmBjbz/71758987170.pdfIn PDF document text
    • http://tunewejewuz.mypressonline.com/top_engg_colleges_in_karnataka.pdfIn PDF document text
    • http://dixurujisefumet.22web.org/sensory_play_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_601b1ce813d1f.pdfIn PDF document text
    • http://lawexape.mygamesonline.org/acceleration_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zonakagud/hAhbjfF/fatiluvanukawim.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/igPigk4/xipediwuvixofitaziru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_6034ed8dd1bb5.pdfIn PDF document text
    • http://vuvefezod.iblogger.org/49185284314.pdfIn PDF document text
    • http://kibixus.iblogger.org/different_versions_of_the_3_little_pigs.pdfIn PDF document text
    • http://kofiwon.iblogger.org/sotewipovu.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/how_do_i_program_my_liftmaster_garage_door_keypad_without_enter_button.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/Plhf4ge/war_robots_test_server_page.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gehdgfK/lucky_block_minecraft_pocket_edition_download.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/xisefowu/gavedipezoxixupabavula.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/wadujibagaxixikuwotizi.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/69834493491.pdfIn PDF document text
    • http://fobeguwimot.rf.gd/fagatotijex.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/79636387782.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_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 5544 bytes
SHA-256: f0973f84067a211e79763fb2fae3681f0e518e96a6e0f7d8f70244e8a003db2e
font_01_sfnt_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 12636 bytes
SHA-256: 0cc88fbead0acd9915e6a401cf422b88fa765d078c4cac305be8d9e84ece0933

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