Malicious PDF — malware analysis report

Static analysis result for SHA-256 823b23f3ce5598f0…

MALICIOUS

PDF

72.8 KB Created: 2021-02-28 01:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 049c28f30086883420871b0753f673cd SHA-1: 72fb4596f929491323802b78ed64efe0c9bff61b SHA-256: 823b23f3ce5598f0d07289f07719ffaa0d877049d3c3d3a03b0f164ad69ae86c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=schumacher+battery+charger+parts+se-2001 PDF link annotation
    • https://bonavipopugob.weebly.com/uploads/1/3/2/3/132302892/rarunumupagikuko.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/sozifeja_rizejorexe.pdfIn PDF document text
    • https://fufefofixikulo.weebly.com/uploads/1/3/1/1/131163927/57c5d4a281fe.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/fb2767f311aaf.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/vumuzutosilurosirere.pdfIn PDF document text
    • https://majabowuji.weebly.com/uploads/1/3/6/0/136092793/9cf1aad.pdfIn PDF document text
    • https://nagiliju.weebly.com/uploads/1/3/1/4/131412426/da20e8e10ca1c91.pdfIn PDF document text
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/642ae2ba970033.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/8211214.pdfIn PDF document text
    • https://gaxadujabe.weebly.com/uploads/1/3/0/7/130775632/a2fb1898934e126.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/8875a1.pdfIn PDF document text
    • https://bonuxomudod.weebly.com/uploads/1/3/2/8/132814593/1869859.pdfIn PDF document text
    • https://mevidumufodu.weebly.com/uploads/1/3/2/3/132303219/9214579.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/wolawatin/neutrinoless_double_beta_decay.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/yoga_nidra_guided_meditation_script.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/zezabopixo.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/whatsapp_web_app_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/zomopuf.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/perl_cgi_example_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/bexajometiwogagisirirege.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/can_i_get_tomtom_maps_for_free.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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 6020 bytes
SHA-256: 6bae5d735d505a81ff64196fac0b885ca696bb5a95954d80f7d55967ac9e30b7
font_01_sfnt_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 14136 bytes
SHA-256: 70d44fdb4806766d64c73428df2e68f0280058f559119f24d0dbe18b4b513b8a

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