Malicious PDF — malware analysis report

Static analysis result for SHA-256 8287cb43d11068d6…

MALICIOUS

PDF

54.3 KB Created: 2020-11-09 11:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c962f7cd8a7052961c0768dd9a0671ea SHA-1: 5d380c8b7e3fcbebbb89084bd40ffe815fa11af0 SHA-256: 8287cb43d11068d62bc3408dcda4b59a42274d4d65f9dc09614184727a49eb09
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://traffking.ru/aws?keyword=free+people+search+using+ssn In PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/pezoromatipob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5fa1ff0382c41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5fa4bb7e4efd0.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/sabiwafewonugipufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8bb453a05a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5f9d200184d63.pdfIn PDF document text
    • https://lifufokawalujiw.weebly.com/uploads/1/3/4/6/134687559/tigapakuxomirexutub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f90ca47bd93a.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://pujawuto.weebly.com/uploads/1/3/4/5/134588096/bivixuzewe.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/2983b8f1-f881-4615-9f95-45b1e1b55705/95899839811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70284384-c836-45c8-a154-7f8d1b5ec2bf/wuzozenevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074db9f5-ed02-428a-9796-2e0ba235e772/lamivuninovekejakur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbac8c1-ab33-44b7-a79e-6f3e234bdc85/49471983580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50428689-f038-4e21-b2a5-c815e8f08f79/zukoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fcaaa8-ee45-45bf-9e3c-a73a7eb866a8/csec_physics_past_papers_2019.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_off0000867e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867E 4952 bytes
SHA-256: 0ae48bbcb54cfc3f56d07fded3f3b5c10a1f5817c1f4e8127ac2af608c15cdd4
font_01_sfnt_off00009741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9741 11320 bytes
SHA-256: 3416385c153abb62d31986d5d418bc89caab50080a20ae184d84c60d6a13b4ce
font_02_sfnt_off0000bdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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