Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf993fba0b4f6073…

MALICIOUS

PDF

76.2 KB Created: 2021-02-26 22:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bae3e10c7c263008af4f12b6a08a5533 SHA-1: 4d563d9f0387f02acad07bc34dfadd7a2da8b844 SHA-256: cf993fba0b4f607384105d6c1ca10c0f2858c5c51cdc0938c2af64e2b79aff32
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to direct the user to a malicious site, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=stephen+hawking+movie+director PDF link annotation
    • http://cocobuka3.xyz/67168100414pxmbg.pdfIn PDF document text
    • http://6gusevshop.website/c_7_in_a_nutshell_free_download0m9xb.pdfIn PDF document text
    • http://bestsaleshopin.xyz/boy_scout_uniform_patches_sew_wherej493d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5ff2cae51c49a.pdfIn PDF document text
    • http://xobukafa.iblogger.org/34944516075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fdd9db4be090.pdfIn PDF document text
    • http://alex-travel.moscow/60207382392st2h3.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/bupijila/69296231456.pdfIn PDF document text
    • http://fosixijikalapi.epizy.com/cbse_12th_improvement_exam_2020_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/new_hairstyle_boy_2018.pdfIn PDF document text
    • http://nawopezor.rf.gd/tupuwudunibum.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/pembelajaran_dengan_menggunakan_media_audio_visual.pdfIn PDF document text
    • http://lejonawazemu.rf.gd/arithmetic_series_algebra_2_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/54169103379.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/how_do_you_set_a_armitron_sport_watch.pdfIn PDF document text
    • http://pexoroxijaseduj.rf.gd/nediwigije.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/quarterly_tax_payment_form_1040_es.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5596 bytes
SHA-256: fa506d25257ffafb0ea70e1aa9984d3c8311e63980b056dbc5abdc963bc368a9
font_01_sfnt_off0000ff75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 10604 bytes
SHA-256: 4ae45e8f631b97a2275496941514776064cb3963ce88603ffcd3599ef8bb19f4

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