Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ec8df24ebc42d1…

MALICIOUS

PDF

36.9 KB Created: 2020-04-06 10:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fb451ad30278a23f907b5764a9d6038b SHA-1: ed0c59fd6af24eb75dd97b0466fbaeb6936f0d48 SHA-256: 67ec8df24ebc42d1e1047afad8bf26fc3379c64eaeb840f8d471786b536a4c31
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which appear to be dynamically generated or part of a link farm, indicating a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. No scripts were extracted, but the document body and heuristics suggest a tactic of using seemingly innocuous content to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://loyaltybailbonds.net/uploads/1/3/0/8/130874067/130874067.html#ejercicios+de+funciones+resueltos+4+eso
    • http://octanetrackandshow.com/uploads/1/3/0/5/130590026/jukarexusut-lonobo-xejezojika.pdf
    • http://thomaserica.com/uploads/1/3/0/5/130551266/badexarum.pdf
    • http://thekyelexperience.com/uploads/1/3/0/5/130588922/bejorefesiputup.pdf
    • http://facialplasticsurgery.news/uploads/1/3/0/6/130605291/2944565.pdf
    • http://hbmedios.com/uploads/1/3/0/7/130739598/b18fe661e15.pdf
    • http://andrelamy.eu/uploads/1/3/0/6/130620620/a8a516e8a8eaf.pdf
    • http://buyatendlesstreasures.net/uploads/1/3/1/3/131380205/supinimapuvajutiga.pdf
    • http://learningconcepts.com/uploads/1/3/1/4/131412032/nizipomebinejir_visuwavuri_nananulekiko_zikuxojilulijun.pdf
    • http://wildcatgoldandsilversmiths.com/uploads/1/3/1/3/131378936/4496819.pdf
    • http://bernardgreene4selectman.com/uploads/1/3/1/3/131381677/cf94c07aaa8978.pdf
    • http://janestrauss.com/uploads/1/3/1/4/131407408/8294763.pdf
    • http://omeduconsulting.com/uploads/1/3/0/6/130620963/8904963.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062dc.bin
49311262774e1af2355c2e41d41b2423dbb2f652c5b620deb7bda028852062c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 9192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.