Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e5657de04ec420…

MALICIOUS

PDF

79.0 KB Created: 2021-02-21 13:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b9a86f06b3f4f23425198ecd459016c0 SHA-1: a8c3267bd03b049d2e9cbc025e3261b109aa00af SHA-256: 83e5657de04ec420d4bf17d5cf71cd70f2fe3ce127db1a0addb6b390ca42cc90
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=yamaha%20rxv%20673%20reset PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/2klL7hj/dead_zed_1_full_screen.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/c6cfb386280e5b.pdfIn PDF document text
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/wukilijogiwow_gulawaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dosapupa/Mjiigzb/list_of_cross_stitch_thread_colors.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/ehgLgdp/57606708373.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/kutozetesadif.pdfIn PDF document text
    • https://cdn.sqhk.co/penomufepuk/jBheA3m/barber_shops_near_me_that_s_open.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/2149190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481417/normal_5fe50b2366a9f.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/nuxomigo/employee_engagement_survey_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/11644774882.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/gagevujak.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/big_book_awakening_san_diego_meetings.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/english_guide_book_for_class_7.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/xaduruvuporok.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_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 5380 bytes
SHA-256: 3a7c040a41c648349ba7a6a9ed5c3aaa02f48d013e8083e9f7077e42f0b854b2
font_01_sfnt_off000106d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 12324 bytes
SHA-256: cc8e484099c11f34f6ecb96cdcf7efa381f4fad2e43f2f0774b0f7e99940171c