Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf559bba732f768…

MALICIOUS

PDF

78.8 KB Created: 2021-03-16 13:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 112eed8da3b6dffd32cdeee686f512a3 SHA-1: b0624a4b2a4dcb877ef384a1c7d69a92da50934b SHA-256: 8bf559bba732f76898b16d62cc01adf5d72bb63004e9c1d6843b77c3bc251688
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, including one pointing to 'lozipotod.ru', suggesting a phishing or spam distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=green+concrete+materials+pdf PDF link annotation
    • http://botavubapisod.mywebcommunity.org/duborome.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/verbos_irregulares_en_ingles_en_pasado_simple_y_participio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_603b2959c25f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_60254a862ae37.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/t5p4heg/super_jabber_jump_mod_apk_unlimited_gems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_60201b9d8607f.pdfIn PDF document text
    • http://lujalopenaso.iblogger.org/encyclopedia_britannica_apk_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/sirigibi/avLLhge/bayer_ag_annual_report_2011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473049/normal_60475594a49f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5fd07735ba505.pdfIn PDF document text
    • https://cdn.sqhk.co/wemulekojex/jiiehbo/10998150328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_6037c3dd79c76.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/jagd1qt/fowubodamoraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_60277cb8bde04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_604766cd51a39.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/pPohicz/ding_dong_hide_and_seek_official_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5fdadfa8321ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipisadam.rf.gd/how_to_write_a_tutorial_script.pdfIn PDF document text
    • http://fisowirumelazaj.epizy.com/jvc_kd-x320bts_bluetooth_pairing_full.pdfIn PDF document text
    • http://fufagagebo.epizy.com/almost_a_hero_mythical_artifacts_guide.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/positive_impact_of_globalisation.pdfIn PDF document text
    • http://gibapomidumitar.rf.gd/14_gauge_to_mm_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4e204e-4533-46f4-ac91-1b953b227979/harry_potter_8_book_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7282d8c7-e43f-4a21-a724-7814d6cd77ce/bawabefefodawelinusafis.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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 5332 bytes
SHA-256: 1e38bcb46297aac02947c85fd333515c3074659a9f072be99ee9dc9a085d470a
font_01_sfnt_off0001073a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073A 10708 bytes
SHA-256: 8221ee194ce3dbcee56b88b7b31d360431c9ddc5da0923ccfaf21643bce0f351

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