Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb757a68144f39f…

MALICIOUS

PDF

47.5 KB Created: 2020-08-21 00:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edcc7c150584a087ebf204dcac48e7d5 SHA-1: 7f2032b286716b4e048d3ef1796013e083fd44d6 SHA-256: 7fb757a68144f39fc05406fe85f0c2f48fe710e8434cf6ef5ce68e23c587368a
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://ttraff.ru/pify?keyword=21+cfr+312+ind+safety+reporting In PDF document text
    • http://files.caveiraphotography.com/uploads/1/3/1/4/131438419/c7a7d374dfdf1e.pdfIn PDF document text
    • http://files.bandbbasketballacademy.com/uploads/1/3/0/8/130814856/948a6ced8e2f5.pdfIn PDF document text
    • http://tizilozes.stincrowvoden.com/uploads/1/3/0/9/130969280/zagirajukas.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://cdn.shopify.com/s/files/1/0434/6953/7432/files/rujevefidudojulategazipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/aleister_crowley_o_livro_da_lei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/novipejajafaferap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/14914309596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6434/4219/files/mopum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/mutopalegepibonesaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/amensalismo_ecologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9218/1145/files/delo_song_chupa_ku_chupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/push_button_toggle_switch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/worune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/wokagisez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/83402277964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/simple_loan_agreement_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/17117498318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/21945498572.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 5432 bytes
SHA-256: bafe00a1ae58aaaf9a532326d3322f7aeb88d94f88e50476c8bbfb177ef12f74
font_01_sfnt_off0000814c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814C 9796 bytes
SHA-256: 7cd79ca7fcccb3ceeef5cc18e2aa2edaf6cd5e76157af353c599077f8f26bb9b
font_02_sfnt_off0000a2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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