Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2519ad46ffcf56…

MALICIOUS

PDF

61.4 KB Created: 2020-11-08 08:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 42448688dab27fbe975c096212e69b8b SHA-1: 584b0fc92d92245879a2dc59648ae6223c797ddf SHA-256: 7d2519ad46ffcf569a11fe2b152ae71d6f72d0eb261fbad0948ce8c55fa7ebfa
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://traffmen.ru/aws?keyword=eighth+note+equals+how+many+beats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f939cb555e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f8ce74dc2341.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/0d5dafb7.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/66b3babd-b04f-4b1c-ba97-de0d07a2fa2d/ffxiv_dungeon_unlock_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6a56b0-2be9-44d6-9580-9bacab6ff9ed/suvudogefoliji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8737e0a2-c949-4b26-a5b1-18fad10def5d/peregrine_falcon_adaptations_for_survival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f95b9f4-543a-4be0-b4c1-85b7dd3766fd/fizulewodagefoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6561ef-dc58-42ae-89c2-aa297ad3cae6/bufixizarigupur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbef94f8-ae7b-4fa5-9890-e9f92802276c/27632469009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7a942a-a35e-44fd-af2e-894602829b05/zibenewopabik.pdfIn PDF document text
    • https://tibazimujo468501389.files.wordpress.com/2020/11/manifiesto_espaa_con_honra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1eb8893-cbec-41ad-97bd-9dcc1340a40c/lufad.pdfIn PDF document text
    • https://bejepetuf.files.wordpress.com/2020/11/horror_skull_hd_wallpapers_for_android.pdfIn PDF document text
    • https://pigafajajo.files.wordpress.com/2020/11/clothes_vocabulary_exercises.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/madelizopididam.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_off0000a2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E3 5420 bytes
SHA-256: cedcfc511859af0338c8178736952d3e165e491a030d03f77d7af1bcab9b1485
font_01_sfnt_off0000b542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB542 2448 bytes
SHA-256: 96a21d2f73583e25986efe6162b88ce5548036bce04a48042b7617b795bc955d
font_02_sfnt_off0000bfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCD 11300 bytes
SHA-256: 41f195febdb20a9c33962dc5e9beab89d74b4807d5f7ef6333247f657756902c

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