Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ace43a08e36fc7a…

MALICIOUS

PDF

45.6 KB Created: 2020-03-07 12:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1e9f8f02662151b3739d9cdf96b0d59b SHA-1: f48279ddaecbb3150724edf0e80276342169e808 SHA-256: 2ace43a08e36fc7a480a3db82cfc5d5c9a73b2cabde3807bba679532a766cc2f
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are dynamically generated and point to other PDF files. The document body text suggests a lure related to an 'application letter for assistant lecturer position'. The primary goal appears to be SEO manipulation or redirecting users to malicious content hosted on numerous domains.

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://stanfordinnanaheim.devsite-1.com/uploads/1/3/0/3/130379347/130379347.html#application+letter+for+assistant+lecturer+position+pdf
    • http://bordeauxinvestmentfund.com/uploads/1/3/0/5/130540159/1649874.pdf
    • http://okanaganjetriders.ca/uploads/1/3/0/5/130543107/6156819.pdf
    • http://www.lotusblvck.com/uploads/1/3/0/6/130620575/9726159.pdf
    • http://hostmaster.jennybacon.co.uk/uploads/1/3/0/5/130588207/muvifij_bawinekefawowar_vorij.pdf
    • http://www.virginianutritionists.org/uploads/1/3/0/8/130874102/gorubidage.pdf
    • http://harrisonperksmusic.com/uploads/1/3/0/3/130313459/0cd8e4d2b631795.pdf
    • http://transportedepianosymudanza.com/uploads/1/3/0/6/130605012/duwibexexaxe_benuzegama_vodamipulobovu_tegepuf.pdf
    • http://tightlinemodular.com/uploads/1/3/0/6/130639661/2865813.pdf
    • http://www.saladino.us/uploads/1/3/0/5/130548152/1850672.pdf
    • http://wordzap8.com/uploads/1/3/0/2/130272270/movuwi.pdf
    • http://livingfashions.net/uploads/1/3/0/6/130639459/c07bfc2593.pdf
    • http://kauffmancenterstore.net/uploads/1/3/0/5/130589161/pesuvibe.pdf
    • http://beautifylbi.com/uploads/1/3/0/9/130969655/8ead29d2ab.pdf
    • http://calmongoods.com/uploads/1/3/0/5/130589338/2dda3b.pdf
    • http://www.greenwednesday.org/uploads/1/3/0/5/130550969/949072.pdf
    • http://monextranet.ca/uploads/1/3/0/5/130588333/256191.pdf
    • http://vinyl61.net/uploads/1/3/0/3/130324092/55bb8fccd83ae3.pdf
    • http://vmhconseil.com/uploads/1/3/0/2/130289503/9083763.pdf
    • http://missyolivares.net/uploads/1/3/0/6/130621052/b5251dbad.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_off00008817.bin
c5a8ca4b61dffc2e3b64c882945cef6207901f84b4cad3fb36814faefb1ee701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8817 7948 bytes

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