Malicious PDF — malware analysis report

Static analysis result for SHA-256 c920961f6bede306…

MALICIOUS

PDF

51.1 KB Created: 2020-10-08 20:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f3b54e99f4dfa2f220e591807a9124c9 SHA-1: bfc35711894c2d119486132c81c710f278d7eef2 SHA-256: c920961f6bede3068bcc0d8db3322c18842dabbc5c15c026e4d1426c0ba4a959
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://ggtraff.ru/pify?keyword=6+1.5+v+battery In PDF document text
    • http://files.michaels-photography.net/uploads/1/3/0/8/130814788/xakujun.pdfIn PDF document text
    • http://gofaxuvut.brenthardisty.com/uploads/1/3/0/8/130874523/fesifogapid-pibubedidikub-xipatipaf.pdfIn PDF document text
    • http://files.pageantdoll.com/uploads/1/3/2/6/132695329/5789459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0216/3110/files/timozazowexagoletisapure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0330/7926/files/dnd_5th_edition_players_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/36250836784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a31a7b-a843-4767-bed0-ad3c19fd4d56/jelisuxopozokowine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472b1206-fbdb-402e-b3bc-a2c973ec86f0/palumudadexovajamenolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97063c2c-ffdc-42c2-b718-07230260eccd/77424400533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5055895a-64d3-4d8a-82c4-25cc6278faf3/19338914560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8cc751-b401-443c-9c16-4c8dff84c33e/39715828411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4631fed-a390-4d70-934c-a87b2e4d5162/tudetadubuvezibovotizod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4371dfc4-dda8-4179-b0e0-2d61e701a620/jujomofosukowujuwusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b362a2f5-aa56-466f-ac74-4cca787bdb0d/50382842895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71040446-b390-4560-b7d0-fd22a9959173/3735497076.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_off00007e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 3116 bytes
SHA-256: 13609b563bc811efb66044d692339af402fc22f1ac90662b88ad58bfe1104b14
font_01_sfnt_off00008978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8978 5040 bytes
SHA-256: 53411051d6acc4d70efdba92fbc90a8abea36c4f3f50e873af71391a4fa3881a
font_02_sfnt_off00009acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACB 10736 bytes
SHA-256: 17901b261de7e8d1c6342499adec03325e49e0080ab184e77666b679d7b4ae13

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