Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91578cb84836bd1…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 00:35:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3065ca31a0f4651889a60850b1a8f214 SHA-1: fcf00f7fc917c395f1a3d74cd5ebadd3a51566bd SHA-256: b91578cb84836bd1d145d2f1b4a6e2d52b01a0c734d5225fc823cb567333e44a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a malicious URL, identified by both heuristics and ClamAV detection. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure to trick users into visiting the external URL for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=fishman+loudbox+mini+charge+power+supply PDF link annotation
    • http://lnstagramverifycentre.com/makadudy65c.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/element_elefw504a_tv_stand.pdfIn PDF document text
    • http://albl.ru/troy_bilt_bronco_parts_diagramcary3.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/83137474101.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/how_to_remove_uppababy_bassinet_canopy_2017.pdfIn PDF document text
    • http://eeeeeyyy.space/84602408709qynaa.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/danujebatowudamujaser.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/13078367572.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/how_to_use_smokey_mountain_weber.pdfIn PDF document text
    • http://gromstroy.com/7155387269483t27.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/rixevozajixezos/iifl_wealth_management_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/marvel_animated_movies_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/88758435535.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/quality_management_certification_for_nurses.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/how_to_clean_the_krups_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/sojomosoriwexevawulelu.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/cat_jump_starter_cj3000_battery_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/botukazigikulutitewo.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/how_computers_work_for_kids.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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 5844 bytes
SHA-256: d16f4f80d9b3090535b9d22ec6715f4fe3c31eeffadf83304c587f1dea621c34
font_01_sfnt_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 10920 bytes
SHA-256: a77cc22663d4cea46054850f6793b52b96f41dc8e1310396b330073a9b8e11fc

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