Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab00745fdaf8d5d…

MALICIOUS

PDF

84.2 KB Created: 2020-11-20 01:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b9013f0b7895257b05535604f3d92578 SHA-1: 6a54046b927e9ba735808ca8c64b34a4985aca8f SHA-256: aab00745fdaf8d5db30cbae7c4076bb8a0f6fc4284dd3f6ab0746daa7fa0ea7a
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://gettraff.ru/123?utm_term=ranger+archetypes+pathfinder+guide In PDF document text
    • https://lezotaxodad.weebly.com/uploads/1/3/4/4/134432483/xiwafori.pdfIn PDF document text
    • https://divupitibi.weebly.com/uploads/1/3/4/3/134328085/8331830.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/232f5246726a.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/rexogeguxosix/34747219149.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/biomaterials_and_tissue_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/robekibikuborizuxoxejakoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/61377362934.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/45448658017.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/treasure_island_oxford_bookworms_level_4.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/the_gospel_is_simple_enough_for_a_child_to_understand.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/chrono_trigger_apk_android_working.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/65401742367.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/26100436242.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/76159937992.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/dopirulofir.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_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 5496 bytes
SHA-256: 766da8e73e8ba6c959ba7ce45bf75b368b9ed6eed71b546164046dbcf3bf118d
font_01_sfnt_off00012121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 10120 bytes
SHA-256: 4a24ae9f0abe2c33ce6b9670cf698066a5876434e4e6dbf0a18107becfd1831d

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