Malicious PDF — malware analysis report

Static analysis result for SHA-256 59228385d06109e2…

MALICIOUS

PDF

44.6 KB Created: 2020-10-06 08:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b6235c3e205be1132a478fc51004f90a SHA-1: e5eb43d764efa8f26d61b835c885a93501e226bc SHA-256: 59228385d06109e2c74ed26523eb26d4f8d14fd60223ec09ea01a5d73d35519f
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/pify?keyword=drawing+weather+fronts+worksheet In PDF document text
    • http://jisokul.wiltonneighbourhoodplan.info/uploads/1/3/0/7/130738731/ac32e75e74.pdfIn PDF document text
    • http://files.pierceschoolbrookline.org/uploads/1/3/1/4/131405977/955221e7fe86.pdfIn PDF document text
    • http://files.vintagesoapworks.com/uploads/1/3/2/7/132740598/6694813.pdfIn PDF document text
    • http://files.sobritishenglish.com/uploads/1/3/1/3/131384436/zekisadasa.pdfIn PDF document text
    • http://files.otherworldlyart.com/uploads/1/3/1/1/131163747/6295453.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/xujudazubejijuzipopupi.pdfIn PDF document text
    • https://site-1038707.mozfiles.com/files/1038707/bevovudid.pdfIn PDF document text
    • https://site-1039970.mozfiles.com/files/1039970/rawizoferofevo.pdfIn PDF document text
    • https://site-1043805.mozfiles.com/files/1043805/38905044109.pdfIn PDF document text
    • https://site-1043316.mozfiles.com/files/1043316/zufagun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7973/6223/files/3575419546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8164/1370/files/89334157255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2378/9991/files/budget_authority_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98d0eda-b3db-4fc4-b6f1-206d87e70f1d/5161321018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fda324-fdda-4ee9-9805-71c894c3be84/33620436854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d948d32-d6d4-44d9-9d65-5fdefee8d1cd/3003459011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8928ec-956f-4184-867e-cd43605ab5c7/63029930723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55894d31-6bd3-41cd-b4f1-3f807c1724d6/bukozanevatedo.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_off00007020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7020 5152 bytes
SHA-256: 24264f4f0afd11a80cdbb68c029476b27df75a7aeeb41ac2bddaeeae59e30c4f
font_01_sfnt_off000081c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C5 10252 bytes
SHA-256: 9dfc1702a392cd2062b9fc30c1eb12cbacb53dd0caf1a99f28a7b020b7bc7956