Malicious PDF — malware analysis report

Static analysis result for SHA-256 077b71c0762cb270…

MALICIOUS

PDF

97.2 KB Created: 2021-03-17 15:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 78ec2380983b9f18f348577e4edf0b8c SHA-1: 5e9e008c38b113d72e99c436c00d005818096df4 SHA-256: 077b71c0762cb2706cc91c1c7e7d3175e10c68e5cd13a6beb50ca8accd5a4820
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a phishing site, disguised with text related to a TV show. The PDF structure itself does not contain executable scripts, but the presence of an external URL strongly suggests a phishing attempt to redirect the user to a malicious site.

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://jacksth.ru/123?utm_term=fixer+upper+mystery+episode+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386618/normal_6017107e21452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425504/normal_5fca20355bd94.pdfIn PDF document text
    • http://laxelenokuro.22web.org/18757733403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_60393aafe1c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_602447dc5cee3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigokabuwawi.epizy.com/moto_x_2nd_gen_battery_percentage.pdfIn PDF document text
    • http://jexiduro.rf.gd/laxmi_ki_aarti_song.pdfIn PDF document text
    • http://xuwugufufokiti.epizy.com/pedifejinale.pdfIn PDF document text
    • http://xerofefulut.rf.gd/how_to_install_kwikset_keyless_entry.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/48277421424.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/helen_georgia_visitors_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/78142366416.pdfIn PDF document text
    • http://lubozogemodusa.epizy.com/keto_food_to_avoid_list.pdfIn PDF document text
    • http://romugonixop.rf.gd/3_phase_transformer_calculations.pdfIn PDF document text
    • http://ruvowepager.epizy.com/82606761153.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/diet_after_stroke_fact_sheet_uk.pdfIn PDF document text
    • http://simatan.epizy.com/xogifevazosififated.pdfIn PDF document text
    • http://gemunedipu.rf.gd/xosufas.pdfIn PDF document text
    • http://pewubep.rf.gd/evaluating_logarithms_color_worksheet.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_off00013e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E33 5164 bytes
SHA-256: 6f6bf1949d4d1c73a2351b08aa652918eef1a16a9c8c7ccfa37d8e93226c12ca
font_01_sfnt_off00014fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC3 11692 bytes
SHA-256: 81109668b5f1c22d7bcea55ed34c7547a805c5bb64163a01b8252a155bc6b57d

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