Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c78c00c958e72c3…

MALICIOUS

PDF

74.7 KB Created: 2021-02-26 22:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8079468975aa53340dccb815db29ef23 SHA-1: 993159544da0544ec9cad5c763a4186151f35e34 SHA-256: 9c78c00c958e72c370173fc261324fdfec2336af6169365c2f63f52f99d40b9c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/award?keyword=agatha+christie+novels+top+10 PDF link annotation
    • https://kenoduzuran.weebly.com/uploads/1/3/5/3/135350653/4480081.pdfIn PDF document text
    • http://uber-global.com/odoo_technical_documentation0sdt2.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/kakele-vovegelesaxo-sodebevunavol.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/bosozekaj-dowuba-kabix-xaxuwimivujibi.pdfIn PDF document text
    • http://woodlesenka.ru/342962607942ahoj.pdfIn PDF document text
    • http://ubzvp.com/how_to_determine_the_melting_point_of_a_pure_substanceals4f.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/virus_scan_android_apkw46te.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/a0d89315.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/gixawetopoli/bahishti_zewar_in_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/tokufuge.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/atlas_anestesia_regional.pdfIn PDF document text
    • http://sisepof.rf.gd/zukopaxajisi.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/who_narrates_the_beginning_of_lord_of_the_rings.pdfIn PDF document text
    • http://gemakeruw.epizy.com/4482824618.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/10_envelope_ai_template.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_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 5436 bytes
SHA-256: 238ef725ee83116843185ce6a912244ade58a2373b51f34abea06a4493b71949
font_01_sfnt_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 10116 bytes
SHA-256: fa695a6026a56f595079facf4d46e5724472bb5ab373f7019ec5bef70caf4dc7