Malicious PDF — malware analysis report

Static analysis result for SHA-256 705ce416a4e53e00…

MALICIOUS

PDF

71.9 KB Created: 2021-02-25 04:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6e0cefe24821ba29d90b86bc3f308463 SHA-1: 208116a6030a038adab1f72f4107d0d89acca9c1 SHA-256: 705ce416a4e53e0079379c6aeb0dd386e826be79995c5bd65874daa90b3c5ab4
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://bologen.ru/award?keyword=data+analysis+ap+stats PDF link annotation
    • http://tuvugisuxizew.iblogger.org/tcs_quantitative_aptitude_questions.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/lepojobujotodil.pdfIn PDF document text
    • https://zonozedu.weebly.com/uploads/1/3/0/8/130874021/muzowotab-xexumegotepaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fed6f1f7fce0.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/samugakivor.pdfIn PDF document text
    • https://midumusifefo.weebly.com/uploads/1/3/5/4/135401272/f9b4f45edbd70d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_6012ecccab351.pdfIn PDF document text
    • http://simamopi.22web.org/7622827002.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/difigomisosak/38435264041.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/johnstones_durable_eggshell_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/best_selfie_stick_wirecutter.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/warhammer_40k_8th_edition_rules_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/barimafejasubezuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/georges_bernanos_livros.pdfIn PDF document text
    • http://sowinoto.epizy.com/circuit_board_background_for_android.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_often_do_shareholders_receive_dividends.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/pejaragagibolamubu.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/financial_innovation_definition.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_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 4816 bytes
SHA-256: a515ea82d4c5a72feedcbf3f7fb8c70f6313263fab02c8bf7bf9a41eece84bfe
font_01_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 10268 bytes
SHA-256: 5d61dcb7ec857a1a1059ec621bbd50349211940b02f63d85fec6fb483e0a13ca

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