Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb760fc65f92355…

MALICIOUS

PDF

103.6 KB Created: 2021-03-24 09:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dbbc9bcfcf74afa98e2acd6e7e36a3dc SHA-1: b1dc4df12fd3302802f0676c75a9c083feb13058 SHA-256: 1bb760fc65f923551a08cff9b76cbdce93a85d1f754607984f4d682efc71e391
126 Risk Score

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 numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links on potentially malicious or disposable hosting, likely to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=bose+321+series+iii+manual PDF link annotation
    • http://koprovk.xyz/88351603478saz5u.pdfIn PDF document text
    • http://olymp-trade.top/321953484711mib.pdfIn PDF document text
    • http://pinerapidsrr.com/kavuviivtut.pdfIn PDF document text
    • http://apsdd54gfv.xyz/cual_es_el_liderazgo_democraticomi7yt.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/5368022.pdfIn PDF document text
    • https://cdn.sqhk.co/vovidonob/uyxUgdd/no_limits_night_racing_facebook.pdfIn PDF document text
    • http://helen-art.ru/dulevulizilimhxge.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/lzhaVjN/trials_frontier_cheats_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jfdgd4k/who_catfished_nev_schulman.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/dXibiha/punjabi_video_status_for_whatsapp_2020.pdfIn PDF document text
    • https://vujezogovi.weebly.com/uploads/1/3/5/3/135348950/rabuvenuke-rotikenev-tisamuroko.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/3YgjAlV/library_exam_questions_and_answers.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/degagaziv/today_weather_report_jabalpur_mp.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/formation_pour_agent_immobilier_en_suisse.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/xujugizemudisamulijo.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/girl_scout_daisy_uniform_guide.pdfIn PDF document text
    • http://rimamosapike.epizy.com/bullet_train_game_for_mobile.pdfIn PDF document text
    • http://tetekabiguteg.epizy.com/43918768949.pdfIn PDF document text
    • http://lesuzikabe.epizy.com/7050803019.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/210207926.pdfIn PDF document text
    • http://rifoxofome.rf.gd/notorious_big_life_after_death_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F14 5228 bytes
SHA-256: b8e6d42d77bb6ad1e45b4816f80dc9ad13cc1a148b133db7d31646e3b08c6213
font_01_sfnt_off000150c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C3 12468 bytes
SHA-256: 5169626fdddceda40b09b128df591d0ac47387315ad8e29effbd4273a8a293a4
font_02_sfnt_off00017a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6D 16084 bytes
SHA-256: ad48983ab68ec37d0d7b026e3bddc1dd680b39c8801da5f7943111150d59e898

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