Malicious PDF — malware analysis report

Static analysis result for SHA-256 81fda1693b7724cf…

MALICIOUS

PDF

49.9 KB Created: 2020-10-17 09:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dbc97ef689a8232ecc6da5eb5e3ce538 SHA-1: e152f14c51a77ee8949e8152117b9bd4073efc09 SHA-256: 81fda1693b7724cf68f0e55e39db6aba831c961c227f537e2b6824dd2baf4914
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/123?keyword=e58+pocket+drone+manual In PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/8a6898.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/f605b9aa5c57e.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/vavuwawelovujewuvub.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/75dd1ce6df.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/jovifigote_vijal_xomen_sazibujokol.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/cae83016b58fe7b.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/7232879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f89d373b7bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f89419e28e92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1d2b623d-2c8f-475e-ad41-bfac25c543da/zusatitedeboba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea7713a-b0be-4b26-9376-51b997b1f519/79783696890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6ae103-795a-4d35-82fb-1ea8b29dcf30/matevetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd591b73-d4d7-49f3-82a5-2c67f577cdbd/fipazakese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6839b123-9643-479f-9374-910570807879/tarubutodijutalipajid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c38199-96a2-43e3-9618-ce539ac5345e/wokusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0832df41-c7fa-48d0-8447-9453ddd4233b/vejebamogajisekarodaberos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f18d0c6-55c5-401e-9107-b3fad355655d/kukabizetoxenelowudasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626ae365-0c90-4700-8040-75fd202e79b7/book_starhot_employee_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4deee7a-2bf6-44d6-b9cf-0ed5ae31b616/vebivu.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_off00007472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 5216 bytes
SHA-256: 469d39a8bca992e692c0cc4b18aec59a29fd0c0ac2591dbb4680d563b20eb321
font_01_sfnt_off0000860b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860B 11228 bytes
SHA-256: 36bad9015028c8df4aaa0adce81c8a13701a8b76e21ac9815762b3edb8298f5a
font_02_sfnt_off0000abbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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