Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31dffe79b039860…

MALICIOUS

PDF

35.2 KB Created: 2020-10-10 16:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7b186276590ba6ea49aa9be69b2627e0 SHA-1: eff5f83874cf200c505fc156bf3327e0f07699f7 SHA-256: b31dffe79b039860ad39dcf2469e1b15ed2b07bd2f6307dbc5661cc065ede328
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=aroma+arc+2000a+manual In PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/84255881699.pdfIn PDF document text
    • https://site-1036756.mozfiles.com/files/1036756/fimatotos.pdfIn PDF document text
    • https://site-1042843.mozfiles.com/files/1042843/vewumoredotopelom.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/69082316541.pdfIn PDF document text
    • https://site-1043087.mozfiles.com/files/1043087/bovaralolubesure.pdfIn PDF document text
    • https://site-1043091.mozfiles.com/files/1043091/91074194132.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/metugubuzotowivusilexugup.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/92877975549.pdfIn PDF document text
    • https://site-1038519.mozfiles.com/files/1038519/51349123148.pdfIn PDF document text
    • http://zusux.chrisklein.com/uploads/1/3/1/0/131070080/vebomujotasuloz-detabimeli-zarexu.pdfIn PDF document text
    • http://files.ourdivecenter.com/uploads/1/3/1/4/131407135/6359097.pdfIn PDF document text
    • https://site-1038326.mozfiles.com/files/1038326/noloxikewuxama.pdfIn PDF document text
    • https://site-1041489.mozfiles.com/files/1041489/13964789478.pdfIn PDF document text
    • https://site-1043485.mozfiles.com/files/1043485/71424840855.pdfIn PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/rijifetapemafufurumita.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/65426008401.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00004c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7C 5028 bytes
SHA-256: 0921c303cd20073f3cd2ca90ccbdafc705d2f886234077f62af483ecc65c4439
font_01_sfnt_off00005d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6E 10188 bytes
SHA-256: 82250b10b05386563fd99d210c3ab4699b6ed668893f9ffbb5f39d11e15d1ea9