Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47cc608a6abdb57…

MALICIOUS

PDF

74.2 KB Created: 2021-02-28 22:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 47ea2fec8f3c21a69af59c619dfd9eb9 SHA-1: 4c6487c604b8cb67766e5fd01bad44ea7100c780 SHA-256: b47cc608a6abdb5787cfdd1729eb09841f52e57dad67ec65cafb93e11d5bc396
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=oracle+11g+sqlplus+download In PDF document text
    • https://cdn.sqhk.co/zikufivol/7NgizBr/fepunewapuri.pdfIn PDF document text
    • https://xasamaxubema.weebly.com/uploads/1/3/5/3/135387487/b65cf.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/452c44e0e8.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/hgeSUid/detopiropujavaxejiku.pdfIn PDF document text
    • https://tasototunone.weebly.com/uploads/1/3/4/7/134755659/rezibera-dexugazudi-kuboduruwev.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/34980189872amo8x.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/hcUCibn/xamefo.pdfIn PDF document text
    • http://voztrans.ru/transferencia_de_calor_por_conveccion_ejemploslzm6m.pdfIn PDF document text
    • http://cleanup-sale.site/kodegad1o5r1.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/lurutopobi/54421614005.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/what_protein_is_dna_wrapped_around.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/32915487851.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/blood_bowl_2_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/landlord_guarantor_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/cant_stop_wont_stop_nyx_concealer.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/tamil_hd_movies_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/bter_jodhpur_rechecking_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/pan-_africanism_the_idea_and_movement.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_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 5536 bytes
SHA-256: fc27088789b95b6bcb856d54cda495b504b73bd84a827c095daa770c8d810e46
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10752 bytes
SHA-256: 7600b25447fa33b87be9ecbb57b92662b517cea8e99dc59e1231c9c8c5407999

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