Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf59493f14b8649…

MALICIOUS

PDF

76.8 KB Created: 2021-05-03 00:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a4b44baefc68ae60f7e534f848f96e29 SHA-1: a7dfeb5e3aa36870bd3742e2961e72f1d8c2f07c SHA-256: 1bf59493f14b8649b920b67cf8c66a0ab9e42607fa808d262834e1911265eeaf
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to a URL that appears to be a lure for 'Mitsubishi plc programming online training'. This suggests a phishing or malware distribution attempt, likely leveraging social engineering to trick users into visiting malicious sites. No scripts were extracted, but the presence of multiple suspicious URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a malicious purpose.

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://jacksth.ru/strik?utm_term=mitsubishi+plc+programming+online+training PDF link annotation
    • http://najelipopusivut.getenjoyment.net/zowopirom.pdfIn PDF document text
    • http://limebago.iblogger.org/breakthrough_movie_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_600000010d1e7.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/c_language_technical_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/tejiwufigepopara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fec361683e28.pdfIn PDF document text
    • http://morikulifitoj.22web.org/bhagavad_gita_telugu_ghantasala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_604503b72bbbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417648/normal_5ff24d2e547fb.pdfIn PDF document text
    • http://productwood.ru/85495847439u3o6p.pdfIn PDF document text
    • http://bagidopivulo.mywebcommunity.org/40925955425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_600d9b962e630.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/cuisinart_one_cup_coffee_maker_instructions.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/86691210079.pdfIn PDF document text
    • http://metaleagle.ru/66105082181tslrs.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/rubidokezive/2004_mercedes_e320_reset_service_light.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/schizoidn_porucha_osobnosti.pdfIn PDF document text
    • http://sawokinajiralar.rf.gd/92192299410.pdfIn PDF document text
    • http://zijomofi.epizy.com/odia_love_shayari_photo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/gomisigujutukamoriresogaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/wrong_turn_2_telugu_movie.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_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 5492 bytes
SHA-256: e4f38ff69a51057bfd7231df8ca789fe17e64a85b62c7cf0a7a1fbf536c3a184
font_01_sfnt_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 10916 bytes
SHA-256: 0ca0c92c0ee180c260a49eef318c2cb7b2ce2fbe183eb4919c8d3aabed6f99af

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