Malicious PDF — malware analysis report

Static analysis result for SHA-256 7818f190d21b3854…

MALICIOUS

PDF

66.5 KB Created: 2021-02-10 18:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3eac1785df8e92d80bb6507f7c6f23b7 SHA-1: df54ca29038c7a8ca4d3532e7b69884740ce1be4 SHA-256: 7818f190d21b3854869b8337480453acf7a0fc34059af0fd0a45898f31a4ca3c
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://jacksth.ru/123?utm_term=3rd+world+farmer+unblocked PDF link annotation
    • http://xejevojesinil.22web.org/74767497814.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fc91c39da31c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5fc7a8892ceb7.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/w7xjjgg/98054169376.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/boridagitufemat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422161/normal_5ffa3ec72c9d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452171/normal_6005536e2fb07.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/hdyh6jh/custom_skin_creator_unlocked_premium.pdfIn PDF document text
    • https://manobafezelibo.weebly.com/uploads/1/3/1/6/131636879/petaxem-jofonubebosiju-buzezivaz-foxexale.pdfIn PDF document text
    • http://boviriso.22web.org/char_broil_performance_6_burner_grill_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/o0gjcia/strike_force_heroes_unblocked_76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonobufusig.rf.gd/white_geometric_pattern_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/55991582926.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/suvusizunugugu.pdfIn PDF document text
    • http://nelojodopon.epizy.com/54097062395.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_off0000c565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC565 5356 bytes
SHA-256: 1805476014c5a5603e118992bea763ec0a894db33a7454f08676f5aad605379a
font_01_sfnt_off0000d797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD797 11048 bytes
SHA-256: ffc65cccc07a694275e492c53192fbf9463a3afbf997e1e73249a7cf531209e4