Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37ee084cf6f021d…

MALICIOUS

PDF

68.6 KB Created: 2020-10-16 07:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e0167138d6ec98c8c73078e6573a2b24 SHA-1: f8d444fd4306a92faf692403fe1c204372452e4b SHA-256: e37ee084cf6f021d526cb95649149297a9177932825bcab8f5a22aa68d333765
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.club/pify?keyword=root+xiaomi+mi+a1+android+pie In PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/wubakivafulovinemuzeg.pdfIn PDF document text
    • https://site-1039817.mozfiles.com/files/1039817/kodoxewet.pdfIn PDF document text
    • https://site-1041295.mozfiles.com/files/1041295/91868426387.pdfIn PDF document text
    • https://site-1044186.mozfiles.com/files/1044186/animal_crossing_hybrid_flower_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f872bf7caf9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f8829eae6137.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/1/0501/9857/7335/files/disney_hercules_movie_review_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/namefifuvasovovirataze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2524/3040/files/68612239142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1627/6128/files/31961262285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3029/4940/files/udf_ice_cream_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4489/5392/files/retro_fitness_hours_tomorrow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/board_game_instruction_booklet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5285/1111/files/31275634436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f006843f-e796-4af9-b4e3-8a868462d515/15265100343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaad5512-0152-43c7-b937-c50b6ba4a832/golonurimorasewadom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d41b8da-e941-4766-af9a-590a31f9f5cb/55137184833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903b13a4-489a-426e-8405-7e861144c8a7/45959578307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550588e9-ae54-458d-8a39-ebb523d45ceb/totivuvaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/free_online_virus_scan_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/perfect_cherry_blossom_stages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8233/8470/files/62883181778.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_off0000ce14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 5020 bytes
SHA-256: 6a43908b4820f48849c8a9571928dc2db09ac85f54434b70a5d09e1a30709207
font_01_sfnt_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 11060 bytes
SHA-256: ae6b39b77e61fa4ad63c3a0cf7291d2c0f2ab977271ffb77089e5da8b47f2f0f