Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac1eef162372829…

MALICIOUS

PDF

66.8 KB Created: 2021-02-19 01:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2d189aaaf1ddb7086cbce711d293e00c SHA-1: 2084f786d654a3129515744df4fa2361b61a1763 SHA-256: aac1eef162372829c5fb06e0529d1659f9b13ac5056fa4a5aa3ebd4aaa8226a0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=excursions+in+modern+mathematics+9th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5fd79a303ac24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379489/normal_5fcf18c9424f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fcd3d2ddc3fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369332/normal_5fe133736e91b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_5fca6bcf83ffc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fcaf61f6efb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fcef81b75d73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444877/normal_5fc5fa9dd1577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_60145068d32e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_600de2dba3a54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5fde9063439ff.pdfIn PDF document text
    • http://xidijisuf.22web.org/what_genre_is_maximum_ride.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopanitovoxa.epizy.com/ziroxaweguwo.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/coeur_d_alene_lake_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/67065185838.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_off0000c852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC852 5544 bytes
SHA-256: a7836e9a731b73bceebfcb7c251a83c057f51dd7c8f28469e4afa3ab2eb6829f
font_01_sfnt_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 10488 bytes
SHA-256: c100060be8bf6bbe94697fca956c7e95656ecef41be6a3df06e45f6a895905af