Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bce734a7b9093f…

MALICIOUS

PDF

48.1 KB Created: 2020-10-20 10:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 06b3f10d953257b896189686b2280c8b SHA-1: 7ba9ceed0331a23422fec9f238037e1e042713af SHA-256: c8bce734a7b9093fe1805ff8c9442a5fa2d0fcd8300bccdfed2d2e755e1a1f84
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/pify?keyword=hawthorns+away+ground+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5f8bf31b8c064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f8c5aaf3c08f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f8e1cffe27cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8e96abcb1e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dce29671-9d67-496d-b3a6-0a553286427d/52739918193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b56d23b-2243-4362-a29d-9f28668921df/bubejazegewoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3369aa-5279-4390-ae83-54caa768f3ed/1414001521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91106596-edf7-4ca8-b63f-bab87be1e641/17234223469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b99838-2b65-4b20-8607-803e5209793a/dappu_srinu_ayyappa_songs_naa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9861ef5-3d83-41fe-a70a-c2394078153e/jaludotewojoniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e64c5d-78dd-4470-900c-a770cf5eba02/zoxovojimudafozab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3629e77a-7149-4eb0-aafc-b4646a4697cb/96974955663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524aa1f8-39af-48e9-8896-f9cbecba73cf/12751792662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7196674-236f-4988-8770-a57deedc80eb/mugofapuleros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73bfdc9b-2d92-4cc4-bf1e-3d38076a15a3/denemamexunosenotovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7809e22-d983-4816-b6fa-744bbe117699/65878409166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9213/9939/files/stream_avatars_pokemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8877/9166/files/jeep_roadside_assistance_telephone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/waves_tune_user_manual.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_off00007249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 5092 bytes
SHA-256: e523b97df83a60496665d03fe93cee5f2ee9a876abfcb3b372e92347fec54d15
font_01_sfnt_off000083a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 9824 bytes
SHA-256: ac63667ccd8f5d88fdbfd064a47395378174c3a8817eafadcb9779416d8c114b
font_02_sfnt_off0000a52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA52E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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