Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffd4985b3fb189d…

MALICIOUS

PDF

73.6 KB Created: 2021-02-21 03:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 98726224a063e68fe62e8c51db7ba828 SHA-1: d7bf0e2d256b110add68b0aa98a0aa5ef692febb SHA-256: 2ffd4985b3fb189dbe0bc4fb7ba64ea956bd650b63947f5fb0bfcad3691006e5
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://bologen.ru/aws?utm_term=husqvarna+223l+weed+eater+spark+plug+gap PDF link annotation
    • http://rbqjkwklnd.xyz/orthodox_religion_meaning_in_urdu4mcjd.pdfIn PDF document text
    • http://remeik.ru/aiou_assignments_answers_2018y0epo.pdfIn PDF document text
    • http://nonly.xyz/masubavinufisefegesixiq680f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fdc57726c965.pdfIn PDF document text
    • https://tovorugezix.weebly.com/uploads/1/3/4/5/134599805/migonux.pdfIn PDF document text
    • http://bostpolamos.site/word_letterhead_template_with_logo2cgar.pdfIn PDF document text
    • http://1xbet-registrat.site/boutonniere_deformity_xray6w00s.pdfIn PDF document text
    • http://bestgirl69.com/sql_server_2019_ctp_2._4s7o1j.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/wovedukevikov/wisconsin_licensed_child_care_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/cisco_ise_windows_certificate_template.pdfIn PDF document text
    • http://dumevurofif.rf.gd/33728376853.pdfIn PDF document text
    • http://sozidimimu.rf.gd/nature_s_answer_vitamin_d3_drops_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/luzotesunemovofovizewumug.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/pazikorir.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/3758355668.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_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 5724 bytes
SHA-256: 46316bfe15b400f4db0b2981987dfe047a944dc2f6b241118f41a89ee8a33185
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 10444 bytes
SHA-256: 21f9c246d3562168c562b22404978b3e4f824c1624392459afc59d5d61b04eb8