Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9224a9ebf329d76…

MALICIOUS

PDF

47.7 KB Created: 2020-10-16 01:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28d183c39b0ab080ce58bc247cab140a SHA-1: e5afddbf6dfef408f558bb23ca2e357d07430009 SHA-256: e9224a9ebf329d76817565061f14ae8a85a6653ff8549609e5e2fe9b6fdb50ce
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/123?keyword=customer+service+skills+pdf In PDF document text
    • https://site-1039343.mozfiles.com/files/1039343/dizopamagipatad.pdfIn PDF document text
    • https://site-1044108.mozfiles.com/files/1044108/76776697424.pdfIn PDF document text
    • https://site-1042347.mozfiles.com/files/1042347/26867321006.pdfIn PDF document text
    • https://site-1040424.mozfiles.com/files/1040424/sosuno.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/bilodapawisepu_veluvujam_lutugawuwafamut_gomilub.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/f71a1c6.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/8997904d1d1210.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/tufifejus_juwugotelakug_jemibil.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/1/0496/6091/9965/files/what_does_dwu_mean_on_snapchat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9792/4803/files/adagio_for_strings_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/hidden_fates_promo_card_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1bf7b5-b8ff-420d-8f3a-5535c88b6ee7/wapoputavutoseruxakiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e75936-7368-4ea8-9598-145aa12ed232/36980253451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0055ee09-45f7-4ea0-a892-50eeff112fa1/10280502601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9120/0674/files/33632762140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5639/8246/files/android_studio_project_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0474/9718/files/kenmore_ultra_wash_dishwasher_filter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4699/4588/files/cupid_2020_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8126/1750/files/ecg_interpretation_made_incredibly_easy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8670/3511/files/tile_stair_nosing_trim.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_off00007bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 5120 bytes
SHA-256: 9e7217b02026124be81f1ffb4d0e29d96a3dfac78ea34b6f9d723b5432a6b734
font_01_sfnt_off00008d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D58 10548 bytes
SHA-256: ca5f26a300d4c73f89d1702427ce229618dd314128a8a693e1e4d9d60c1e0071

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