Malicious PDF — malware analysis report

Static analysis result for SHA-256 528f04849bb0d9ce…

MALICIOUS

PDF

65.8 KB Created: 2021-02-19 08:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b62e88a8827687b90f1f034a99d25461 SHA-1: 4692b37d9bf78e0a0489c05e56be2b9ba918102f SHA-256: 528f04849bb0d9ce4c41d7fab1d09dc74efede0e7ada136d25f4fb5cd4997f0c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving a malicious payload or phishing content. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it's designed to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

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://baarspo.ru/strik?utm_term=jvc+kd-x50bt+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/jepivitixiwo/HJjcheD/multi_for_facebook_with_color_themes.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ctOhdSs/68551707562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff496bb91e28.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/iixFlvl/42017398995.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/gigdYFU/63756302721.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/gg2ijhg/little_big_snake_unblocked.pdfIn PDF document text
    • http://warofonatar.iblogger.org/iphone_chimes_ringtone.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/4fdiaE0/tegexerovalabusizok.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/ih1agf5/34691908582.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/sRihXq1/kafovoxeto.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/dRii2TT/icymi_news_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/cqdUzY0/cbse_class_8_science_textbook_download.pdfIn PDF document text
    • http://besuxiju.22web.org/real_estate_broker_commission_agreement_form.pdfIn PDF document text
    • https://cdn.sqhk.co/sojejinof/gKjdPrH/51500952924.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/hYjijeN/vurazekiwepuzaki.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/hhfthdW/weather_liverpool_pa_17045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://numebazo.rf.gd/spoken_english_course_melbourne.pdfIn PDF document text
    • http://dinixebun.epizy.com/amenorrhea_aafp.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_off0000c60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60E 5648 bytes
SHA-256: 6483c7f4a9320d06a1ced788735146c9a9bcd4380e858af203638ce21c51c7c4
font_01_sfnt_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 9780 bytes
SHA-256: 96055d2f57c4ac2d70a8a954e56a42e4c6ca54b8ab30fbd69878527a18fc3462

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