Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b9a93c13950fd1…

MALICIOUS

PDF

47.6 KB Created: 2020-10-28 20:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 96be0186f08d76a093c54b6f6bb6475c SHA-1: 94c767d93fc4beadbd6721ec6dc21422cf72819a SHA-256: 88b9a93c13950fd11cb53c43455998c5281ca90f43abb4abf77ae52c581eb946
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=mcneel+update+service In PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/6703088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5f9942219b14f.pdfIn PDF document text
    • https://nadazeva.weebly.com/uploads/1/3/4/4/134499610/kejab-tavijiwipove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f914bf6c04df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f95bb5f3b595.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b45.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b45.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a36e.bin)
    • https://cdn.shopify.com/s/files/1/0483/8670/3512/files/barras_de_access.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb2918b-4cab-4179-80c6-07f824d219f3/where_is_billy_fuccillo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/download_youtube_apk_file_for_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/gallbladder_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38befea-13e3-43e8-a4d0-5e1f8bc7ebda/jixaxulunewerarini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9110/7233/files/crash_bandicoot_playstation_mobile_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/sampoorna_arogyam_siri_dhanyalu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2410/5115/files/ammyy_admin_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7208/5926/files/93086234154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/dragon_city_mod_apk_offline_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72f0a6a-bac5-46e3-93d9-90649ba786a7/veporutujazinowalegok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2568579d-1d54-4c7c-aaf6-6aca6ab18672/kibekoli.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 extracted file (font_00_sfnt_off00006b45.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B45 4904 bytes
SHA-256: 964b3d09f02cf5ea2fdc5df78c73b573dbb3318484aa7b59c4d595f7391bd821
font_01_sfnt_off00007bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFE 11604 bytes
SHA-256: 12fd04ea38f876ad5b18b30439b63d10476b95ff653bab2b979b329a0a6cb0c4
font_02_sfnt_off0000a36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA36E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361