Malicious PDF — malware analysis report

Static analysis result for SHA-256 6326a6f253cc1702…

MALICIOUS

PDF

42.9 KB Created: 2020-03-15 11:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28135dd8e1b5068e90e759007b45c177 SHA-1: a97ec42876d77052ceed128e2350325bb7075ec0 SHA-256: 6326a6f253cc17020e0c8f5061e88401abee660c30ff387556f44fe9ef878c90
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified as a PDF link farm. The primary URL http://london-office-7.pleasingfood.com/uploads/1/3/0/4/130488362/130488362.html#aghori+dance+song and many others point to domains that appear to be hosting further PDF files or HTML content. This suggests a tactic to manipulate search engine results or to redirect users to potentially malicious sites.

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://london-office-7.pleasingfood.com/uploads/1/3/0/4/130488362/130488362.html#aghori+dance+song
    • http://sansosh.club/uploads/1/3/0/6/130605135/7cb7c4e7596.pdf
    • http://visionbystin.com/uploads/1/3/0/2/130289782/fowedufuposariz.pdf
    • http://www.myjeshop.com/uploads/1/3/0/3/130323196/xubebumineb.pdf
    • http://kemperle.eu/uploads/1/3/0/6/130605338/loweluk.pdf
    • http://sysdep.xyz/uploads/1/3/0/4/130490115/d1de4d41d.pdf
    • http://mygoodlife.solutions/uploads/1/3/0/6/130621142/4133240.pdf
    • http://bookrenewers.com/uploads/1/3/0/4/130491356/376e3.pdf
    • http://blackduckdental.marketingfactorygroup.com/uploads/1/3/0/6/130605396/8959714.pdf
    • http://ajauchinger.org/uploads/1/3/0/4/130483736/1787327.pdf
    • http://www.taraharvey.com/uploads/1/3/0/7/130739070/juselosebas.pdf
    • http://www.united2019.org/uploads/1/3/1/1/131164366/xagekuvirutaf-kosil.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006985.bin
7628ea3ffaaeeaf4c7798c53622ba4138ecdc693fa1969f144da2fe20988a8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6985 8168 bytes
font_01_sfnt_off00008858.bin
5af04ac04d5ffc38c7719e15e0b677f86c966dc2032aa1bddc5a4964f0302536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 16356 bytes

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