Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdba68bb9b7e6bdb…

MALICIOUS

PDF

41.2 KB Created: 2020-04-01 19:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f525bf231b3c4e27bfdd5521c2f59422 SHA-1: 4d59bd3160ac63396a918b53dbee79ed91dbf626 SHA-256: bdba68bb9b7e6bdb750fe0ca64d6cdb4335f5ddd86a088a07c79ccfd94cfee2f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the URLs found in the heuristics, suggesting a deliberate effort to link to external resources.

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://ryersonmetowe.com/uploads/1/3/0/2/130289045/130289045.html#kilgore+falls+rocks+state+park+md
    • http://ponyenzo.com/uploads/1/3/0/7/130740065/2469511.pdf
    • http://claytalk.org/uploads/1/3/0/6/130639571/fesewivepuna-vigebativima-vigerukativapi.pdf
    • http://mephisthoncvv.org/uploads/1/3/0/6/130639607/5014936.pdf
    • http://oceanterraceirp.org/uploads/1/3/1/0/131069997/kesusisikosofepa.pdf
    • http://smartupfinance.com/uploads/1/3/0/4/130483153/gikekijukeseju.pdf
    • http://businessgoamerica.com/uploads/1/3/0/6/130603818/goxofaxozegopev_tagageliwi_misofurada_tudedopeled.pdf
    • http://eventhype.net/uploads/1/3/0/6/130639854/8dc92a82481.pdf
    • http://declutterwithdawn.com/uploads/1/3/0/9/130969066/puvidusivosagaloromo.pdf
    • http://ksiegowy-tychy.pl/uploads/1/3/1/1/131163878/221030.pdf
    • http://blended-mamas.com/uploads/1/3/0/4/130483480/5119198.pdf
    • http://totshaveneventschildcare.com/uploads/1/3/1/1/131163738/f60a5.pdf
    • http://heritageconcepting.nl/uploads/1/3/0/3/130313191/xajuzagixud-maguv-zorat-gazezamo.pdf
    • http://ogangii.com/uploads/1/3/0/3/130323485/gasufudomaxiv.pdf
    • http://sewingtheseeds.net/uploads/1/3/0/4/130477040/fd2d9b6b16df609.pdf
    • http://diyprohelp.com/uploads/1/3/0/6/130639305/d984b97fbe55fc6.pdf
    • http://kathrynelle.com/uploads/1/3/0/7/130776225/biziduveduxuwe.pdf
    • http://gloversvilleteachers.org/uploads/1/3/0/4/130489958/misuzetetoji.pdf
    • http://swissliftconsulting.ch/uploads/1/3/1/4/131437306/856b1ac472.pdf
    • http://livesevilleluxury.com/uploads/1/3/0/5/130543318/giladovik.pdf
    • http://findingthewayofpeace.com/uploads/1/3/0/6/130620642/2ca254d65542b.pdf
    • http://mfamcc.com/uploads/1/3/1/4/131452800/6d362355f.pdf
    • http://loriswilson.com/uploads/1/3/0/6/130639779/5516054.pdf
    • http://wiseleylaw.com/uploads/1/3/0/7/130739087/6425150.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_off00007993.bin
63f624acc4d02318902b43481b1e2a6bf2531dfda183d678a85acd754427c2b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 7572 bytes

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