Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5b9a991e82d380…

MALICIOUS

PDF

77.2 KB Created: 2021-03-02 12:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 35e4e36af47db7462d47787af9c15c30 SHA-1: a902340b6fa9a1f676a9af6b47b5a14eb81a45cc SHA-256: fd5b9a991e82d38043d7bb28ede779b1165861202e94621eb297a15c2b56de37
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://xajibur.ru/award?keyword=software+development+project+management+plan+example PDF link annotation
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/vusoxifob_rovubotiza_jovopojutes_mizudoki.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/UrXjfeS/82452105673.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/8496643.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/WBqNghf/apple_airport_wifi_scanner.pdfIn PDF document text
    • http://korsabarca.com/wunigarufasetudinanudoj99g8.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/0d71fe.pdfIn PDF document text
    • https://nokibuvekunel.weebly.com/uploads/1/3/1/1/131164430/xobiw-pagugewos-vivogemesogewo.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/dhaPOgi/parallel_worlds_the_heroes_within_download.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/c5e213.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/bewunog.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/wiwamoxamo/27029381125.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/33371777310.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/jojogofakibikuduj.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/crystal_river_scalloping_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/peguvivubaganud.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_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 5696 bytes
SHA-256: 1d7a7ed1459ce7a3fa0ca01d193f18d4558fce65a30e4fc82a1efef6de6d5a67
font_01_sfnt_off000103a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 10500 bytes
SHA-256: dc35a707e1451ff4f4e235c315e3145fdaa561e4849a721bf1b31bc212cdfda8