Malicious PDF — malware analysis report

Static analysis result for SHA-256 52317216edb5777d…

MALICIOUS

PDF

63.6 KB Created: 2020-11-17 23:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7cad5639439d46b6150adce87aca9b7d SHA-1: 1465b0a435983bb4bb12e816d8c2b6cffbe8a8a7 SHA-256: 52317216edb5777d0e08b078386d088552679dceecaaa1c5c6d734fb94a24407
254 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
  • 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://cctraff.ru/123?utm_term=family+nurse+practitioner+review+manual In PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/nesuzojusubizop_budazij.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/3bca96418345d2f.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/tesotiwapax/bike_race_mod_apk_aptoide.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/bunureziritazunadenenam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783ec490-a5d5-47e3-9111-efb887c28217/3441526193.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/29667046142.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/aimpoint_comp_m2_vs_m4.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/horse_dealers_daughters.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/town_of_coupeville_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d00b67-a9ad-4b39-924e-c27d65447d67/bukimomeziwiromutozesetid.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/2771363352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e726d97c-6202-4420-ab59-0ae04d9232ba/tesugowumugipidawenewiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01957e83-db62-40d5-97e6-0d7eea8733cb/guardian_drama_vostfr.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/bsc_part_3_chemistry_practical_book.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_off0000b8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FB 5288 bytes
SHA-256: 1950eeccb705eef53b4a670430aa14718d982deedf227d505b66e159d468e15e
font_01_sfnt_off0000cafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 11380 bytes
SHA-256: 1db3a71804219e8fbfbdbfeea947081597d6cd35db55167a1c005a3f0114b806

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