Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5a1d6762b72a9c…

MALICIOUS

PDF

81.3 KB Created: 2021-03-06 16:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a8001d15835fe9f931b75addf832b36c SHA-1: 6aba660454d0957608f063256671984f1fd311ac SHA-256: ae5a1d6762b72a9c6446f2f6ce6287902226eed207b6686c1a30429579c2e937
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=what+are+the+strongest+intermolecular+forces+in+2-propanol PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407331/normal_5ff780d6af325.pdfIn PDF document text
    • http://potolkilife.ru/red_maple_tree_planting_guidejv9s0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5fde9e4e0a032.pdfIn PDF document text
    • http://tranquils.space/kadhal_psycho_song_download2qg4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469837/normal_5fed2c2935c5e.pdfIn PDF document text
    • http://naturmilans.fun/brother_cs6000i_vs_cs70006mw8y.pdfIn PDF document text
    • http://befelofote.iblogger.org/family_and_friends_6_workbook_answer_key.pdfIn PDF document text
    • http://medway24.com/how_to_turn_on_a_hamilton_beach_durathon_ironl7ku9.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/kewuxejikiwe/jutisulejed.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/65299504828.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/chunks_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/cset_science_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/mafaxupazi.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/14907705191.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/biology_dictionary_english_to_bengali.pdfIn PDF document text
    • http://tosememab.rf.gd/16679772501.pdfIn PDF document text
    • http://dedefujog.rf.gd/which_keurig_model_is_the_best.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/48230439762.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/10751575301.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/zigadijeralig.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/formal_thanking_letter_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/70934156010.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/xixovebezapedev.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_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 5608 bytes
SHA-256: f6aeaae27780f358c7da83997538bccd12f64cbd0f386a09fb100e55fbacfe70
font_01_sfnt_off00010ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE9 12180 bytes
SHA-256: 4e65eaa62b6c978128ae428580f000c3cbad080f275b5f9eded8f59b64521017

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