Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ed7697b23bf241…

MALICIOUS

PDF

34.9 KB Created: 2020-09-30 15:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a80143ad6f9c75e2488054ecded613be SHA-1: 63ec33e36592e693f9558133aebca7e7e74a9f28 SHA-256: 25ed7697b23bf241f85a8491fca3ece4b215ae985b9062778c8784eeaecdea1b
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=possessive+adjectives+and+pronouns+exercises+for+beginners+pdf In PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/pifeposopedopo.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/wemelebebovumatapexobisu.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/94840191711.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/tumevazuzixapipog.pdfIn PDF document text
    • http://jexebazo.wenatcheevalleyrappellers.com/uploads/1/3/1/1/131164131/mepixovileworapebu.pdfIn PDF document text
    • http://sidala.triratnaleicester.org/uploads/1/3/1/0/131069839/351249.pdfIn PDF document text
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdfIn PDF document text
    • http://files.ultimatesourceoflove.com/uploads/1/3/1/3/131384335/tozawodeje.pdfIn PDF document text
    • http://gafaved.samecommunityvt.org/uploads/1/3/2/6/132681692/nazagodiji-zotufesi-sofowelafum-laxukukitu.pdfIn PDF document text
    • http://velusupid.destinedance.com.au/uploads/1/3/1/3/131380344/lopad.pdfIn PDF document text
    • https://site-1036944.mozfiles.com/files/1036944/43622990065.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/53348380402.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/33256335698.pdfIn PDF document text
    • https://site-1038497.mozfiles.com/files/1038497/85407237278.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_off000048d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D6 5636 bytes
SHA-256: 276175f2a7201f1334f783187a2cd7d7c48281beff48f3fccc9c2e5ccfef2d49
font_01_sfnt_off00005c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 10108 bytes
SHA-256: d35703ca69b4d3d6be1c32c07e529588284a24bb29cc1d48108d2f05d2ed8a18