Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b74f73b4ec285c1…

MALICIOUS

PDF

53.5 KB Created: 2020-10-16 01:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4be6ab560ca6c6f25ebf1e5a6c583b9d SHA-1: c9999fd8924f29f3374e7c334c64edc86602704b SHA-256: 6b74f73b4ec285c19c4896d02351618bd8b3e53441b48e9f212cdef8c09a31f1
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=warcraft+2+game+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f8845a504847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f87019da1557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f887d10755db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f87644557120.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/1/0484/9260/9686/files/gebarunegulivixabole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/62985881671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/gazewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8448/files/seiu_1000_contract_negotiations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f000fa-93b5-4653-a2f9-6dcaf8ab8482/joguwovemetedabevesir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c6ca92-846f-46e1-98de-3603ddd1c70a/xexiredakowukudazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ccfdce9-c548-4c9b-b48e-8107b02e7525/59510770778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d95f3f-ea51-4bfd-9048-813d2a128465/zavumenubasalujavipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/g_shock_wr20bar_manual_5302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/registrar_of_contractors_washington.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/49542254232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5331/2928/files/skyrim_spawn_npc_mod_xbox_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7337/1300/files/truxican_standoff_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe185eb-9cad-4517-862d-0ce52b6f1d85/dixexalot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e98b60-6ac2-47f9-9456-feb631996b29/jedirozip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab96b47-ee89-4ff3-886b-2ba243683dec/liwevetosiwowowusavoxaxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34037175-f9e0-4aad-a83d-eac8af28a828/86284196750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d750a56c-be16-47c8-838a-e708f00090ae/lavepajabobokirimuvufefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682f3520-6ef4-4288-a18f-faf64750c3e1/mebadibinusomarerazo.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_off000092bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BB 5168 bytes
SHA-256: 7a5f171f3be8f89979f62246e64230728be06bcfb00cd4158f2851b7934ac13f
font_01_sfnt_off0000a44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA44A 10204 bytes
SHA-256: a223ab0d1c1369bf5b79b9e6c0334470e2d7de4d7617c8bfc44591705953dc0e

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