Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff56f3780f82227…

MALICIOUS

PDF

31.6 KB Created: 2020-04-06 14:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 22c6018db6115262f81107d7041d4597 SHA-1: 29f4cad12d0193f3f32e816f80edf13d9756253d SHA-256: 6ff56f3780f82227fc1dd616a6da10fcb5724abd04e3244992f83caaf2a30184
104 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external websites, many of which appear to be part of a link farm designed to obscure the true destination. The document body, though partially corrupted, suggests a lure related to movie downloads, which is a common tactic for distributing malware or leading users to pirated content sites. The ML classifier strongly indicates maliciousness, and the presence of many external links supports a phishing or content-piracy lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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
  • 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://act4adultlearners.com/uploads/1/3/0/5/130539979/130539979.html#maze+runner+the+death+cure+full+movie+in+hindi+filmywap
    • http://clauclau.shop/uploads/1/3/0/5/130589305/8714386.pdf
    • http://filmmusicartsfestival.net/uploads/1/3/0/5/130551423/6152361.pdf
    • http://stewartandsmart.com/uploads/1/3/0/9/130969910/fanexuzadotovijitubo.pdf
    • http://sunriseroasters.com/uploads/1/3/0/6/130604162/831b90c19.pdf
    • http://internationaldiscountheadquarters.com/uploads/1/3/0/2/130271098/xivabagazotix.pdf
    • http://kbresumeconsulting.com/uploads/1/3/0/8/130873839/bonagi-bozakeze-simub.pdf
    • http://envsource.org/uploads/1/3/0/2/130289369/tasuganu-fudekozimag-pezeze.pdf
    • http://cognatecollective-es.com/uploads/1/3/0/6/130621194/rasedidinojus-nelurenab.pdf
    • http://damonster24.com/uploads/1/3/0/9/130969570/wepisurufum.pdf
    • http://stairliftsacorn.com/uploads/1/3/0/3/130313144/9379600.pdf
    • http://royalbromont.ca/uploads/1/3/1/4/131483170/3108396.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_off00005293.bin
9e9245b9497c23da5d6d8fdf1f81e988f7ccbbe7cc6a40a6fc7848a9cd4974c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5293 7300 bytes

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