Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84c0d4cae05574c…

MALICIOUS

PDF

46.6 KB Created: 2020-03-17 19:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f71794196b1ae2503df628b1f46ba4ed SHA-1: cdab538450e1d11608d810e67ba3399878df3b6d SHA-256: d84c0d4cae05574c1e6425a6cea05260be9cd5e867e07edeee803c528321e5d0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm designed to host malicious content or distribute malware. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-optimized PDF links suggests an attempt to obscure the true malicious intent. No scripts were extracted from this sample.

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://officerethink.com/uploads/1/3/0/5/130590710/130590710.html#como+hacer+una+flor+de+nochebuena+con+papel+crepe
    • http://valleyofthedunes.com/uploads/1/3/0/7/130739454/sebixapebo.pdf
    • http://miltonshandy.com/uploads/1/3/0/6/130639810/27e8c4d57fc0d9.pdf
    • http://webmail.cadena.co.uk/uploads/1/3/0/5/130551369/5ee6b.pdf
    • http://myuberscoober.com/uploads/1/3/0/8/130874325/midaxozetesileguba.pdf
    • http://www.innermomologue.com/uploads/1/3/0/6/130621238/fazuz.pdf
    • http://www.annlanegateslegacy.com/uploads/1/3/0/6/130639068/1244784.pdf
    • http://www.bajasharkdiving.com/uploads/1/3/0/6/130605198/nobosewuj-dojoditow.pdf
    • http://suttonjoi.com/uploads/1/3/0/2/130289580/gudafa.pdf
    • http://byblair.co/uploads/1/3/0/6/130621483/zuvovedadagegem_putelaxenu.pdf
    • http://americanational.us/uploads/1/3/0/6/130621258/2010781.pdf
    • http://upincyberspace.com/uploads/1/3/0/4/130435646/vaduparojokudewafagi.pdf
    • http://fierceimagination.com/uploads/1/3/0/6/130639811/jiwefozaropoki.pdf
    • http://gweniveremoon.com/uploads/1/3/0/2/130289313/9977625.pdf
    • http://veraspencer.com/uploads/1/3/0/6/130621045/rinukolo.pdf
    • http://dronerealestates.com/uploads/1/3/0/7/130738569/tepufufowedibu.pdf
    • http://syriimire.com/uploads/1/3/0/8/130874564/noxumimu-dojodizori.pdf
    • http://psychotherapy121.org/uploads/1/3/0/3/130323109/f4803323.pdf
    • http://andrewleepost.com/uploads/1/3/0/7/130776174/mukasesunabuwed-godasep-rawedixi.pdf
    • http://flahomebuyers.net/uploads/1/3/0/8/130873790/bamifikera.pdf
    • http://jmcdermott2011.com/uploads/1/3/1/0/131071220/65a42d1be1.pdf
    • http://www.trendsoftencities.com/uploads/1/3/0/6/130620803/genereg-gazagipuv-madotabipoka-xizerawunowiti.pdf
    • http://ppas2020.com/uploads/1/3/0/6/130605389/ribonuzu_zedajofi_tolemuwaxives.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_off00008d4b.bin
13fa9d19c8da48f29a7a5066ae8947594eb3d7adda293a78a97e93becf67f1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4B 8636 bytes

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