Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c385c9a8c7306d…

MALICIOUS

PDF

40.0 KB Created: 2020-11-03 00:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ba08e9c3073b961f49e2a267a38c81d9 SHA-1: 194bc4ae9e8f02c0ac219461329b58caa4e706b1 SHA-256: 45c385c9a8c7306d1ffe37ee54290003b503e055151d6baae140ca10b1a0db27
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://gettraff.ru/aws?keyword=st+thomas+aquinas+quotes+on+love In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f8c62d5688dc.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/jakujakula/crestwood_middle_school_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/cdc_shingrix_vis.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/5740746043.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/brgschaftserklrung_vorlage.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/nurses_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/dragon_ball_z_dokkan_battle_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/all_of_me_piano_easy_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9094/5215/files/pirates_of_caribbean_easy_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/thing_1_shirts_for_family.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/sky_pillar_pokemon_emerald.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/vixoso.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_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 5116 bytes
SHA-256: e48bce9a44c87cc6f711f36b9fef4af2cc4b422108d4c9fb8ee98f5526a378de
font_01_sfnt_off00006f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7D 10248 bytes
SHA-256: 0f4c06ed6a4482e969c0d6d052ebbdf664c18b90616da570d63a3b94a5ff6b6a