Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0ce2df2dd9ca66…

MALICIOUS

PDF

39.7 KB Created: 2020-04-03 02:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cbf691c2cc6116738d27d7afaa627114 SHA-1: 148fac912aebe165f0ab8e8f4b408f7bc2f8aeb6 SHA-256: 1a0ce2df2dd9ca66ce1502fe27bc1817f2f274dd996a449a64a05e59a4eb3e01
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains a mix of obfuscated text and URLs, suggesting a lure to a link farm. The primary intent appears to be SEO manipulation or directing users to a large collection of potentially malicious PDFs.

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://legacyexoticsandaquatics.com/uploads/1/3/0/3/130379251/130379251.html#que+es+un+bl+en+flash+mobile
    • http://carolinebatson.com/uploads/1/3/0/2/130272387/1024662.pdf
    • http://downtownlacondos.com/uploads/1/3/0/9/130969563/piwuvitasu-nazopogomuxaw-juferor-lixejepagikap.pdf
    • http://ospreyinvestors.com/uploads/1/3/0/3/130323131/127e0d96d06a5.pdf
    • http://nadjahanseneditor.com/uploads/1/3/0/6/130620228/7258669.pdf
    • http://siachile.com/uploads/1/3/0/5/130589056/kozikur.pdf
    • http://jdsenergyservices.com/uploads/1/3/0/3/130323592/8463113.pdf
    • http://ancorametalworks.com/uploads/1/3/0/5/130551477/tuzawajasaxuker.pdf
    • http://thehumoflife.com/uploads/1/3/0/7/130775828/d00a2141d741.pdf
    • http://helicoreservices.com/uploads/1/3/0/5/130590368/6b377267b6930f0.pdf
    • http://leapinggnomeband.com/uploads/1/3/1/4/131438800/1100f20de666.pdf
    • http://purplehippocreations.com/uploads/1/3/0/9/130969889/zefupane_bategomexidod_palaruwizowa.pdf
    • http://gmt.capital/uploads/1/3/0/7/130776514/xevasurilofuwizatode.pdf
    • http://inkboundstudios.com/uploads/1/3/0/4/130435876/af22f37cf.pdf
    • http://crossingwaters.net/uploads/1/3/1/4/131483830/rijezada.pdf
    • http://euronetconsulting.net/uploads/1/3/0/3/130324170/bd07d0d.pdf
    • http://leenacroft.com/uploads/1/3/0/5/130588710/kapodemez_wupujatonasoba_gugimizese_rovegapenoriru.pdf
    • http://nothingbutpurpose.com/uploads/1/3/0/6/130621715/dofaro.pdf
    • http://mybettervalue.org/uploads/1/3/1/4/131407152/e9c0b6e3.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_off00006eaa.bin
159c283ca1bdc42725fb9ee751bf1916c7e98c563609e5dded92d458428fa010
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 9224 bytes