Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d0b30128edacdf…

MALICIOUS

PDF

38.9 KB Created: 2020-10-15 11:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4c7af47df0b2764e435a205fc6959e7c SHA-1: 705dd55032e07ee937abb02b1669342c7641ab7b SHA-256: 39d0b30128edacdfc1cee688e456801ffc9b98f2706d90c61152d4e9fa06484d
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.cc/pify?keyword=tubebuddy+pro+free+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f878fb7b6237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f87b2f55561d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f875b353f838.pdfIn PDF document text
    • https://site-1039330.mozfiles.com/files/1039330/32810009425.pdfIn PDF document text
    • https://site-1041084.mozfiles.com/files/1041084/67695708705.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/simabadopedideloza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f87d1cd26545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f87cfec48fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f878835c9d2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bab84d-b270-45ff-b87e-5fd31a5da9a1/rarafozila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25fa613-ce5a-4a5b-97ef-a07a4d64ce51/kerakipegibaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3009cf36-aded-4f2e-bd74-5fd0be1fc6ef/buraxobisizegug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a8fe93-2186-455e-8b42-15c67ddd949b/56171416986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c2683d-8afb-4bde-bfd1-dd36388ab611/15972151333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a70bd26-7ce4-48a0-91c8-2f2aaa2f15ba/moguvikomafitumuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25e3d8e-2b46-4443-bdf1-2dc8fd311630/bubemega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ff3e04-56f6-4f79-bc84-65559f2ae5f6/35810630401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7ed308-e82a-402c-a1be-dec61093993c/98384442645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9645/0227/files/84306917056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3186/2679/files/amdro_fire_ant_bait_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8439/2869/files/lincolns_plan_for_reconstruction_apush.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_off00005a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A73 5080 bytes
SHA-256: e4f78a864793c18fd21f7aa774f648832b82a5941a49499601db85e1bd684b63
font_01_sfnt_off00006bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD2 10132 bytes
SHA-256: e627fbfdc292931e195c0833d18c38239f64fbb8fd0516fe7aa2b9a5db611bb8

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