Malicious PDF — malware analysis report

Static analysis result for SHA-256 7036f3229c03e32e…

MALICIOUS

PDF

48.3 KB Created: 2020-10-19 17:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ac78569d5b2c305fb1bc87cf31b88298 SHA-1: 4057e48fd3762cc01011e47b38d13b3b0be9756c SHA-256: 7036f3229c03e32e94df81818a79a964cc18e1aaef589f6095b4c24fde3bb7b7
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=motivational+short+story+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f8bcbfc34889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f870ddccca98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8a91d5b3a8e.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/dd9033d67f05d8.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f8bd519569d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f8c165146ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f8ce793a7fb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8d1a4eddac3.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/56c4742ffb2635.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/8537873.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/1ef7ff80-ab8c-431e-a3ca-2c75f8a3d4bc/joziwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5459/0880/files/real_steel_apk_mod_revdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/wipeout_2_mod_apk_revdl.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_off00007ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 5296 bytes
SHA-256: ea602d7f1a0184d5895d1f79cc5ca1247f552c1de15822a23a53310f6f070599
font_01_sfnt_off000090c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C8 10352 bytes
SHA-256: f404d08650231850c6d054577d54f696b7c72f89878ee01a0163e919c7bf18d3

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