Malicious PDF — malware analysis report

Static analysis result for SHA-256 957760885cd3ac31…

MALICIOUS

PDF

49.3 KB Created: 2020-10-01 19:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4f73c1c52b26654ed0f7fc8b81553e3b SHA-1: 617a5c43a2bb17ff8bbe4448e8c59fdd357936ee SHA-256: 957760885cd3ac3182ceeaeabd5e1846d1cb297163494c7560bd721a43c68ce0
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=aircrack-+ng+manual+pdf In PDF document text
    • https://site-1037103.mozfiles.com/files/1037103/27016705596.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/galoj.pdfIn PDF document text
    • https://site-1036805.mozfiles.com/files/1036805/nalepimixunekapibajuroja.pdfIn PDF document text
    • http://files.northwoodsbulldogs.com/uploads/1/3/1/1/131164499/96246.pdfIn PDF document text
    • http://jerob.tomharris.com.au/uploads/1/3/1/0/131070340/buxib.pdfIn PDF document text
    • http://files.saxenalab.com/uploads/1/3/2/3/132302802/butokoziju.pdfIn PDF document text
    • http://files.hollisguitars.com/uploads/1/3/1/6/131636814/gitawi.pdfIn PDF document text
    • http://sixaxog.aaroncalafato.net/uploads/1/3/0/7/130738870/kusuvi.pdfIn PDF document text
    • https://site-1039382.mozfiles.com/files/1039382/xugusitevevovej.pdfIn PDF document text
    • https://site-1039131.mozfiles.com/files/1039131/walekumovogumoku.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/8a5d8cc5-67e5-4007-b224-e7a46177a313/vofowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e818302c-ac44-46c9-9ab8-dbf4fd4b39d5/zilagakowup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de95d28d-f2eb-44ba-bff2-d241650d9d70/benimuneganis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6727e207-d56f-4182-85f1-71e6ca3c57a7/25368857188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a7038c-5780-4336-9f15-1796d2bc2432/91949565092.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C49 4956 bytes
SHA-256: 6bde082f460833e2962ced4f585b10fbbf3b94c504a4579292a5fe9f18fc9ec0
font_01_sfnt_off00007d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 14376 bytes
SHA-256: a7add04019806acce5daf3cd0d9f6941380ac0cd6cedd10b80007840517737d6
font_02_sfnt_off0000aa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA09 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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