Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c61776c1489062…

MALICIOUS

PDF

40.5 KB Created: 2020-10-09 01:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 792af6185b6400b7291aaaabe9628126 SHA-1: d7d168412ca7daa9cfa5cfa6bfe78d92a34306a6 SHA-256: e1c61776c1489062328234461657e7fc5ab57213223bceab3fdb30b15308035f
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://ggtraff.ru/strik?keyword=fatty+wap+trap+queen+mp3 In PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/zuwotujejik.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/sesisogam.pdfIn PDF document text
    • http://zutowageb.jrstonemasonry.com/uploads/1/3/0/7/130775198/3589495.pdfIn PDF document text
    • http://bewemodew.scorecustom.com/uploads/1/3/1/3/131379406/4473302.pdfIn PDF document text
    • http://files.villageofhope.us/uploads/1/3/1/4/131438211/99f693a1a.pdfIn PDF document text
    • http://files.bullittownersclub.com/uploads/1/3/1/4/131408245/0b0cd44.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/5cb60c7a-3d4a-4154-884e-2ca0e35bf0b6/1109655151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83407f9-07fb-46a8-a41a-4dbcf54e43fb/35460130051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea58d5cc-5252-463f-8e43-1093c3502889/15057327743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0533f2-3573-4418-a8d6-576c3c1939ae/vavuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e25467-acd3-4212-99fc-880b3f94330c/27926147337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0470/9029/files/richard_curwin_and_allen_mendler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/crowfall_necromancy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/20764086600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3114/1783/files/95315293916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/empty_oceans_empty_nets_worksheet.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_off00005a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7B 5196 bytes
SHA-256: 349301f7fe131399fa4cc81a175e95336f561082165c84d10bab53340ee98cbf
font_01_sfnt_off00006c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3A 15984 bytes
SHA-256: 649d1b4b7918190df7051dda1cb1390d246c5aac866dc2279d11bf9565147f2b

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