Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b92cc4639b629f…

MALICIOUS

PDF

100.0 KB Created: 2021-02-04 06:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bdb1a51424faad746f3812f249e8a523 SHA-1: 15a1b0373bc25adc5884bbc8e2f459661db8dd90 SHA-256: d9b92cc4639b629f76708e516b5380d435ed420bcad8764c1f4fe5aed35b829e
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://baarspo.ru/aws?utm_term=switzerland+visa+form+pdf PDF link annotation
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/lubevafajobo_nilakisojalumes.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/mupuparetem_bapegizokuzale_wuvokotumifi.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/5082399.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/xjhBjdr/movie_box_hd_app_ios.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/3020949.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/199498708239c.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/4EO6giR/monkey_go_happy_stage_56_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/juzivadareka/iagiK8C/jexowisinemo.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/O1idSgg/elifoot_19_20_pro_download.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/forupokisip/gn_balasubramaniam_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/dalubositu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/69758037132.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/vejexikupugerako.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/saskatchewan_harassment_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/chiari_ii_malformation_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_off0001463d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1463D 5492 bytes
SHA-256: 68a619bc55f6bf7d269c37c54221c9f003f44fe622adeb9b4e4fc47d892123ec
font_01_sfnt_off000158f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F4 12064 bytes
SHA-256: 9daf6f2f9a14e1c517e242bb395a83a1ebff98c686d8bab25aa095a0da0364e3