Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a611d760158c83…

MALICIOUS

PDF

71.8 KB Created: 2021-02-18 14:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1df5bf58a23a901dfc877f13eff5f22e SHA-1: 794fb4a46f794f650a1a4d6445acaabe85adc1be SHA-256: d6a611d760158c83b011114ca9a76c70eddf7049e7673faaf42dcf33eb47eed8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/aws?utm_term=when+christianity+start PDF link annotation
    • http://seplafond.xyz/3ds_max_standard_material_librarytqorj.pdfIn PDF document text
    • https://puruvafapazono.weebly.com/uploads/1/3/0/8/130815059/videsesa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5fcd54cb5d984.pdfIn PDF document text
    • http://magnitoli-2ekran.site/besame_mucho_alto_sax_sheet_music8kl31.pdfIn PDF document text
    • http://qiwi-wallet.online/2288221025nn2ti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5ff0eca26beae.pdfIn PDF document text
    • http://tihefers.online/did_simon_die_in_shadowhuntersbrg1b.pdfIn PDF document text
    • http://pe50off.info/8959948122s40wi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5ff8455845937.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/nigheTj/59965013223.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/mavixu/video_game_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/xesezalidut.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/adverbial_and_adjectival_phrases_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/xumubajijagi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/likebameliredapoz.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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 4972 bytes
SHA-256: 9d5d98d7aaaf0f8309052350dcbd47735089c22982c707299b038b8d7f3941a2
font_01_sfnt_off0000ecea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEA 11164 bytes
SHA-256: e30788cc23cd3313c221c9bd3e4f7198fb27818117edd619dba6096cbce72b7f