Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10ef7dbfbd88b46…

MALICIOUS

PDF

67.3 KB Created: 2021-02-24 01:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e8c42127018d39bb1820dfbd560709f8 SHA-1: 3300e30b1b96e16a0bda6cb9b439af2bba25f98b SHA-256: e10ef7dbfbd88b468033ae5a207d1e3104695ac036ad42378f53b15670d6db2b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=probability+and+statistics+for+engineering+and+the+sciences+8th+edition+devore+solutions+manual+pdf PDF link annotation
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/6422622.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/eZdRyoS/26923982041.pdfIn PDF document text
    • http://love-your-lips.online/pairwise_disjointness_teste9lrh.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/gi8Ixhh/evolution_movie_2015_explained.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/1761613.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/jegd509/top_100_popular_songs_2018.pdfIn PDF document text
    • http://digtalcaliper09.xyz/prognosis_sepsish6jaj.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/cqheRAo/wh_smith_opening_hours_today.pdfIn PDF document text
    • https://kutebebi.weebly.com/uploads/1/3/4/5/134528954/b410e21.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/gyGDijC/kisekenakopelokaxotan.pdfIn PDF document text
    • https://gufulesem.weebly.com/uploads/1/3/4/6/134698375/majikitebeparu.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/bZgghhr/nukedunugoxopagonofij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98B 6064 bytes
SHA-256: 6c1271044c76e0802c29dbf6e8fdd9143392d3baf4ab3e0ead6fbe880a2cb92d
font_01_sfnt_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 9644 bytes
SHA-256: 335ec84ea26176d05a2be2c8e53fddbe659efeb2536911547b43f2c05a12074d