Malicious PDF — malware analysis report

Static analysis result for SHA-256 8105237e9eea3b85…

MALICIOUS

PDF

73.8 KB Created: 2021-03-27 09:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8bb07b76e3333a547e352093bb01d27b SHA-1: 122d2a2e7bfae6594d9b994cc0f63ba7f8020de7 SHA-256: 8105237e9eea3b850d6a6054c57ab24db7c78011346cda7b4da2ea9d1733d169
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded external links, a common tactic for SEO spam or phishing campaigns. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/123?utm_term=kendo+spreadsheet+custom+validation PDF link annotation
    • https://cdn.sqhk.co/seponidozit/hhhheFa/wunuwetiwizo.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/ijFgejc/lisogefa.pdfIn PDF document text
    • https://cdn.sqhk.co/fasazani/hfTrMcT/11271865053.pdfIn PDF document text
    • https://cdn.sqhk.co/wukibezoso/jhfhbjg/82515859841.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/nhdhghb/perfect_piano_mod_apk_vip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ropigitapeda.rf.gd/94018949183.pdfIn PDF document text
    • http://jezafilewore.epizy.com/rotavuxesale.pdfIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_2bd5ccc92d6f495fb24cf89c1e0602a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/the_house_on_mango_street_chapter_12_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/where_does_word_mathematics_comes_from.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/puvidewizabidusaw.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_07435623844f44dd95ed4befe9c70ae5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/grammar_tenses_exercises_with_answers.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_615e4b88be2a4ce0a900b055dd3fbe8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/definicion_entre_quimica_organica_e_inorganica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97abfd5b-f5c1-48c3-990e-e1c568a1cd0a/the_gmod_idiot_box_episode_2.pdfIn PDF document text
    • http://poxelisenaxoxig.epizy.com/76548403275.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/idolmaster_cinderella_girl_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/78062798366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f25c8df-29c2-481f-b000-342219080da5/81658157064.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_5b266d390865417a9f2b2ba906031539.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3621c9-58ff-429a-a60c-e0e40861555d/hindi_english_alphabet.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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 5344 bytes
SHA-256: 8b99ab8ba12f5628fc126fc4e6b711d6e327b7c87ac58753a89358b9bbd8db11
font_01_sfnt_off0000f3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 11004 bytes
SHA-256: cbfce9c12692976239376e38d8e4a2ad418cebea919586c122e08e50a636ef84

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