Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a0dd1d4e570113…

MALICIOUS

PDF

83.9 KB Created: 2021-02-16 22:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5fcc80cb192e4fd9d4bad96ec3c6e4d2 SHA-1: 85e9bb07b3344b619fd2ade5ec5a91f31829056f SHA-256: 64a0dd1d4e570113751508a761bcb48d03bd4dd4e9fd500a0c36a5dea37548bb
196 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
  • 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://jottigo.ru/123?utm_term=1+day+hormone+reset+diet+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407327/normal_5fe7bff4f19c7.pdfIn PDF document text
    • http://smm-target.ru/gta_v_hotel_assassination_stock_guide08pdf.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/64a6279c.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/c4c4a4e9.pdfIn PDF document text
    • http://cyberlife.store/80307784511myfw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_602a366f396ed.pdfIn PDF document text
    • http://yozi.store/22835061921p6d4n.pdfIn PDF document text
    • https://sawuzirerepobod.weebly.com/uploads/1/3/4/0/134040369/2654624.pdfIn PDF document text
    • http://options.expert/marble_ramp_lab_reporti4kl3.pdfIn PDF document text
    • http://indital.fun/cyber_security_incident_management_guideq9dnn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_5fe41ec548a50.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/jasipefulaxiduj/gekap.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/amman_songs_lyrics_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/icas_maths_2016_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/mupado.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_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 5244 bytes
SHA-256: 58f9c527c3649fc023d2168045d75946e2ee100bb35f492291840fa3f0bbeb9d
font_01_sfnt_off00011d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7F 10808 bytes
SHA-256: 8eb9fc921644a5947a7d71498247a3675bafc0ae7a43821b62a99a34090e10e0