Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dad912f4e985a1d…

MALICIOUS

PDF

47.2 KB Created: 2020-11-01 01:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2c399237fc16dbe327816606685e28a8 SHA-1: fa068f897c91fc0483f4fdaa35697ee731883dbd SHA-256: 1dad912f4e985a1d701622748ede99312e1f1ff86c78ebdedfcb56b8b84bb7ea
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/pify?keyword=54+x+84+inches+to+feet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f870dd22e987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f9c45406ecba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_5f8bf19d7e920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tetazino/navafemejapufolinile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcdf3c3-e702-43dc-9747-5b5aeafe1798/17398248438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/age_of_youth_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1032/5150/files/27742451900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909f97de-78b0-4429-89f5-cf71d9371824/dadokopigenejuzakilaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b8b9b9-4db8-4431-95d6-a47e01253208/fanes.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/sop_abortus_imminens.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/pobuvepodag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1189/9044/files/destroy_all_humans_cheats_xbox_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3719/3897/files/great_mills_high_school_yearbook.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BC 4796 bytes
SHA-256: 8ee2c09586cecacdfdc7a03bdc65aba11b872b649e3c9c6649c03e4a7c2910fb
font_01_sfnt_off0000690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 10352 bytes
SHA-256: 692eb60685676379f3da5adf6683aef78696fafd62d75eefae6ed80559e3903b
font_02_sfnt_off00008c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 16216 bytes
SHA-256: d037df551f055afd1d5987f4d3e87812717f9b790abf4df51a968f84bd245f42
font_03_sfnt_off0000a1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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