Malicious PDF — malware analysis report

Static analysis result for SHA-256 99aff15eac0fce75…

MALICIOUS

PDF

71.5 KB Created: 2021-02-14 23:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d66ac5b5aaad05bfe3eefc5c45ef9bf4 SHA-1: 97277c94a1f01b87489aeff2d37abba926dd7c0a SHA-256: 99aff15eac0fce75b39dbce50e41bfc848ad2f24b46aaf60c643f45d8235b442
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=heat+of+vaporization+equation+using+temperature PDF link annotation
    • http://padulima.22web.org/talamu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fdd9eee26a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_5fd9ceec5a241.pdfIn PDF document text
    • http://uaregroup.com/66940282334rl16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5fe03ec2b64d2.pdfIn PDF document text
    • http://kefipipina.22web.org/tefamefuwoseritefijerajib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_60219593856f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5fcdf3038ddf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikepodaw.epizy.com/dujajunokodewav.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/fitovejilibuvaxuwugepenes.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/14193585332.pdfIn PDF document text
    • http://naxilolebepup.epizy.com/gozowaxivozo.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/blattanex_gel_formigas.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/dream_it_possible_delacey_piano_sheet.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_off0000d69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69A 5388 bytes
SHA-256: 59ac2ce486bf34d1e1dc4bde2c0bb56b6882bebc1e858ea2cdb0a24d666147c6
font_01_sfnt_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 11112 bytes
SHA-256: f25bb823c38caa6270e945c33cf70545a7a43097e11071c3dd2b4b901fa0760e