Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e74fd20d678f008…

MALICIOUS

PDF

71.8 KB Created: 2021-03-30 14:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4c08a97c0c5d06aca56ea50a98d0f62a SHA-1: b3cc7f323b8140554b04a71338be6bf739fe7b90 SHA-256: 2e74fd20d678f0088a4069e88862adb37dc4430b005fa194d1569d98bf4b9a5f
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 is flagged by heuristics as a link farm designed for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=casio+fx9750gii+factorial PDF link annotation
    • http://arthromedshop.xyz/section_35-1_human_body_systems_answers52uc9.pdfIn PDF document text
    • https://cdn.sqhk.co/mumepefofise/dhegiJk/genatipomufazudatuze.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/vatofasukobigukuwudani.pdfIn PDF document text
    • http://bigops.fun/zuvatidazojotolebavev1ceu6.pdfIn PDF document text
    • http://gazozaxuk.getenjoyment.net/calculus_3_textbook.pdfIn PDF document text
    • https://xomepuwosabagef.weebly.com/uploads/1/3/0/9/130969083/8047213.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/90Oif02/settlers_of_catan_game_piece_dimensions.pdfIn PDF document text
    • https://vimugowome.weebly.com/uploads/1/3/4/3/134323071/toliba_noronona_witumovovif_rijeru.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/ilahi_program_indir62j2z.pdfIn PDF document text
    • https://cdn.sqhk.co/bareziwo/hbhbMgd/song_kabhi_jo_badal_barse_female.pdfIn PDF document text
    • https://rawewefugu.weebly.com/uploads/1/3/4/3/134394717/xubot_lejuzasev_temazupenev_rovunuker.pdfIn PDF document text
    • http://gidusalutuwisut.iblogger.org/jamofaxev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nabukewegurizev.rf.gd/71262210033.pdfIn PDF document text
    • http://koxowasone.epizy.com/65330750475.pdfIn PDF document text
    • http://jobisazukom.rf.gd/zerividulixir.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/variable_frequency_drive_working_principle.pdfIn PDF document text
    • http://kunubuxeduw.epizy.com/arabic_alphabet_tracing_sheets.pdfIn PDF document text
    • http://nadanopo.rf.gd/free_download_rapidex_english_speaking_course_book_in_marathi.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/harry_potter_gobstones_answers_ben.pdfIn PDF document text
    • http://nomijedelalevi.rf.gd/feneguvixudow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB2 5208 bytes
SHA-256: 4b40437d6685a8843f4d22be1e9b0a9d34a5da394a39e1780239af38b132d055
font_01_sfnt_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 10056 bytes
SHA-256: f8c323bba1b371efb3277f0449f1a3ea46ccdabda6d480292531c4bb74da55cf
font_02_sfnt_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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