Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcd47a51b0e7f4f…

MALICIOUS

PDF

35.0 KB Created: 2020-10-06 17:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 248524e070081789b744bf9c01dc1ae5 SHA-1: 963505bd040840af6f336e9e3b4b6a499d4a07f3 SHA-256: 8dcd47a51b0e7f4fc0b9e254b4803d9e2d9373edb77bfa2b85f7ec6b3e7a46ad
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://cctraff.ru/strik?keyword=juegos+de+transformers+autobot+stronghold+hacked In PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/xukomabexopere.pdfIn PDF document text
    • https://site-1048248.mozfiles.com/files/1048248/xulijodafidimelalubujere.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/dugidalenijewadakosolig.pdfIn PDF document text
    • https://site-1038932.mozfiles.com/files/1038932/25792629625.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/96978654126.pdfIn PDF document text
    • http://najuwi.multimodalwritingcenter.org/uploads/1/3/0/7/130776760/gabukibetigo.pdfIn PDF document text
    • http://nupagu.reviewgraphs.com/uploads/1/3/1/6/131636825/jizamitolozit.pdfIn PDF document text
    • http://files.albamccance.com/uploads/1/3/1/3/131379033/4300017.pdfIn PDF document text
    • http://files.allhandscreate.com/uploads/1/3/0/7/130775821/3c508532.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/4a1eab05-f5b2-46bf-a6ad-ab84aeac3cce/88684493420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b767442c-ca35-4f3b-8bf2-d08b44279dc8/sixam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3ef9dc-7d24-416f-9330-2656e45dbc3d/tijojogenapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b3e5df-1533-41b9-8818-90f8e3cc29b3/jowujamatojanodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b35ef1b-eba6-4ffc-93ff-376785aba7c9/fubaviwemuwetud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995bd3a2-846a-4af5-8d8c-8df1a1f3e5b1/76844217190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa62ba31-12ff-42d0-88a0-2da63e1f5936/89214962726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87a7fbe-eb2e-4aaf-a856-fa05df962f47/riwila.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B58 5628 bytes
SHA-256: 0207e89d086928de2dd4b4d72858a46abcd536e7e1f872357a2c020a2f0c1358
font_01_sfnt_off00005e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E50 9540 bytes
SHA-256: 8d2504129e22b5fbbc0a588a4fd6efe9ae6a591bb446c7dd17c82575c98e086f

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