Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2223b4c2353ccf2…

MALICIOUS

PDF

40.0 KB Created: 2020-10-05 23:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 052a263b2b002ba37321db0fbf6d77a8 SHA-1: 7e3a980087e97252d78280c24e3d504de58b1817 SHA-256: d2223b4c2353ccf2d9fe55bc108408eb69a34da877a34d338e350029e1e00a16
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/strik?keyword=3d+incest+porn+comic In PDF document text
    • http://files.villa-anggrek.com/uploads/1/3/1/3/131379371/difisudenaborex.pdfIn PDF document text
    • http://files.doggleggmedia.com/uploads/1/3/1/3/131384232/wijamub.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/1/0431/7236/4445/files/do_you_need_passport_for_atlantis_bahamas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/centaur_harry_potter_firenze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/xolof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9033/2834/files/libro_tus_zonas_erroneas_opiniones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/84078483899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4015c9-5f60-4a5a-beae-ae484322d28c/binejoturenokokijal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08454a07-f8c9-483c-b644-8f38b01bcc52/zefikisikunebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8537/0022/files/the_dc_comics_guide_to_pencilling_comics_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8133/7506/files/pemomuluturalagigijef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/xofarevibod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/kipaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3642/9466/files/78278728421.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_off00004845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4845 6184 bytes
SHA-256: f1aa7ae81ef929796eb3539307b9aef8e904a9f775dd2f59fd5fbfef932edadf
font_01_sfnt_off00005d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 5048 bytes
SHA-256: fd65ca49e8ac8e36c3ba182b62fba065081dd9067fb7793918083ff563e86e6f
font_02_sfnt_off00006e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 10300 bytes
SHA-256: 4493e4735e8f8c8854b5adf8fbca7bddcbefaa40f365beb11e3a8888b49117d9

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