Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a4313f12ec841e…

MALICIOUS

PDF

70.0 KB Created: 2021-02-28 23:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 03adae6427e0c499cdbfa77769c7baa9 SHA-1: c81b3c9fb375ae4cd1c2194a9ebc27ee479fe21f SHA-256: 26a4313f12ec841e221b7741a273ce57dae46400a1e7eb0105c4a2fee7933080
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=samurai%2527s+garden+pdf PDF link annotation
    • https://muwefojiginilu.weebly.com/uploads/1/3/4/5/134512592/2168795.pdfIn PDF document text
    • https://cdn.sqhk.co/zifixanuk/Vhighih/maviviroxubumejiduk.pdfIn PDF document text
    • https://cdn.sqhk.co/resasenubori/hSjaih7/boledimebewejik.pdfIn PDF document text
    • http://auth02mobility.com/best_beaten_down_stocks_to_buyzhwyt.pdfIn PDF document text
    • http://generalmassage.online/anouilh_medeapwwtb.pdfIn PDF document text
    • http://moymagazin.xyz/xujofikinixitevebemaxigux7e.pdfIn PDF document text
    • https://nobobigo.weebly.com/uploads/1/3/4/4/134403715/eaffa642a3ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/nexupumile/jaoAwhh/gixanujo.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/fejenijovekozu/bbuddah_hoga_terra_baap_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/hotel_housekeeper_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/deep_fitted_sheets_king_size_next.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/96152866213.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/are_dispatch_services_legal.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/futojixedewuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/jurnal_amilum_jagung.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_off0000d73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 5464 bytes
SHA-256: 09731cab0a8dc453a9fcd8167a0b0cab3088e4ed782297997be8b07f8d5f333a
font_01_sfnt_off0000e9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 9860 bytes
SHA-256: 131b57348580dbddb2d91012d5ec3f8f9baef66fc150d87d095226a1feebbd2a