Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed66040c65019cf…

MALICIOUS

PDF

103.8 KB Created: 2021-04-19 04:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: edc7e9e8538288275f53995d6b91b21e SHA-1: abeca6b0de92b80187ffe37f45e2a5e89087f67a SHA-256: 0ed66040c65019cf3553ca70c79e1c85ef0e8a24be5e1f23de0937ce22cbb8bd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=sigma+1009+sts+setup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445544/normal_6063cfe13693d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482208/normal_5fca8b25923fa.pdfIn PDF document text
    • https://suzonozumevudem.weebly.com/uploads/1/3/1/3/131379217/fowomuku.pdfIn PDF document text
    • https://xidozuju.weebly.com/uploads/1/3/4/5/134597445/1816939.pdfIn PDF document text
    • http://punejew.mygamesonline.org/biology_quiz_questions_and_answers.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/9284672270.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/hbxihjf/elifoot_19_pro_apk_dinheiro_infinito.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/adverbs_worksheet_grade_2.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/anatomy_of_flowering_plants_neet_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/f3ifgfN/tarelikobuge.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/tubukeganuji/one_of_us_is_lying_a_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/que_es_el_amoniaco.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/selojalata.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/pdf_physical_science_grade_12_question_papers.pdfIn PDF document text
    • http://noxumalog.onlinewebshop.net/atualidades_para_concurso_em.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/piwemulov.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_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 34820 bytes
SHA-256: f1a3d05565df7875dc04d0d84ff2c1015918e6bcdc112a92b19f5a32a1338468
font_01_sfnt_off00015289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15289 5464 bytes
SHA-256: 473e919a89942a826094e4251e2216c40d350004bc20622a610f92b882b31122
font_02_sfnt_off00016512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16512 14712 bytes
SHA-256: 81f729de9d16de979d31c741dba69c002e21ebc71f1cb47273c24556a2c6be09

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